It seems that stress, nervousness, anxiousness and agitation has become part of my life, specially in those times when I feel someone orders or demands me to get relax, to let things flow, to calm down or a phrase similar.
Why look for bandages (methods to relax) when You can totally cure the problem?
Stress is always part of your life even when you are not aware of it. Constant muscle tension is one symptom of it (normally you miss it). When you play piano, you use your body muscles, but they are never truly relaxed - so the tension is more pronounced in very short time. Why? Because you are trying to exert control over your body and there are conflicting forces inside of it. Compare it to a rubber cord which is pulled in two opposing directions. You want some things and fear getting them at the same time - that is a conflict. You want to play smoothly and nice, but at the same time you are afraid of making mistakes or opinions of others watching you play. You see a beautiful woman or a hansom man (if you are a woman), which you would like to meet and are afraid of approaching her/him, etc. All desires and fears are active in you all the time, even when you are not aware of them - this is that “rubber cord". I can say with confidence, that what you are aware of everyday, is just a tip of the iceberg. Most of it is hidden. Like almost everybody else, you run away from it unconsciously, because it is painful.
What is real cause of that tension, agitation, nervousness?
It is your thinking and feeling only. Toughs start feelings. Your old thinking with connected with them feelings is accumulated in an electromagnetic field, which is compressed in the muscles and internal organs. It fills the body from tip of you head to your toes. In there, there are all you attachments, aversions, desires, fears. Fear is one of the most destructive feelings (and there is a ton of it in each one of us) which grips your body like in a vise. All your thinking comes from that energy. It is an image of yourself (EGO) based on your life experiences and your thoughts about them, which is false, but you take it to be You. You identify with it. As long as that image (energy of you past thoughts and feelings/emotions) will be locked in you body - you will find no rest and will have to live with constant tension, pains, aches. Your headaches are caused by it. Find out for yourself if I am wrong in stating it. Anything you will do to relax, like yoga, exercises, ... etc., will be just like painting an old building which is about to collapse. It may be useful to learn some method for a short term, but main goal should be to dis-attach yourself from that image and remove it totally. It is not that hard, as you do not need to cut off your body parts

These are just thoughts and feelings we are talking about. You have control over them, even if you never heard from anybody that it is true. Do not believe me? Become aware of any thought in your mind and say to yourself something like that: “I want it out" or just “get out" with intention to remove that thought and see what happens. Removing that image/energy will remove all unnecessary tension, agitation, nervousness and give you permanent peace within. That will be reflected in anything you will do in life - as with that internal peace comes harmony - which is your true nature. Harmony means, that things will work out for you, without you having to make much effort. Call it luck, serendipity.
If we are in our natural state, no thoughts are coming. Zilch. Nada. We walk and see a tree or a person and no descriptive/judging thoughts come to the mind. No distractions. If we want to communicate with others, then we create thoughts and when done talking, comeback into peace and uncaused joy that flows through the body. This is normal. If you do not live like that, then you are in Ego/Body mode which is worst then EBOLA (kills quickly). In EGO mode we suffer a lot and in a log span of time. Why live like that if this is unnatural?
How to do it?
First. Understanding who you are and how you function is a must. Some information will come from books but you must apply what you read to you life experiences and see for yourself what is true. Because it is in a book, even very old one, which a lot of people believe in, may be the worst thing for you to do. Prove everything in You, if you cannot prove an idea in You, do not let yourself be married to it. Question everything all the time. Use your logic. Your feelings may lie to you, as they are connected with old thoughts - so do not let yourself to be swayed by them. Be like a child that does not have any preconceived ideas and search, search ...... and search.
Second. Learn to observe yourself 24/7 - to be more precise, watch you mind and body at the same time. It is not hard if desire for it comes from your own logic, trust me. If you just follow someones opinion for the sake of it, it will be worthless and hard to do. Be aware of thoughts and body sensations that they bring. Be neutral in watching it, do not expect, wish anything ... just observe. Follow the thoughts to feelings that are locked in the body by asking yourself if the thought (which you just become aware of) was motivated by (put each feeling from the list) apathy, grief, fear, lust, anger, pride, courageousness, acceptance or peace? Yes or No answer will appear in the mind. Then you can let that feeling/thoughts go. In time and practice you will be able to feel where in the body your feelings are stored/blocked. You will have then zero doubts, as to the truth of it. If now you want to prove to yourself that there is a blocked energy in your body, press soles of your feet with your thumb. Any painful place will indicate the blockage. Massage that place for a while and pain should disappear. Find a reflexology chart on the net and you will approx. know in which body part it was trapped.
Later add to the observation (attention), the world outside of you (so you observe 3 things at the same time). You need to find out the connection between your thinking/feeling and your everyday experiences - which are only a reflection of all hidden and known to you desires expressed in the material world. Recognize the connection and the way to control over your life will be obvious. You thinking creates everything !!!! Do not believe it. Prove it first! Then learn to think properly, neutrally, so you can get what you want, without creating a “mess in your body”.
Third. Nobody can do anything for you. You are the entity that creates/knows his/her own thoughts or accepts and takes for ones own, thoughts coming from others (books, TV ....etc.). Only You can really find out what is in you. Be responsible for 100% of it. Do not judge yourself according to any religious or philosophical doctrine - or all those “questionable desires” that are in You will be hidden. Let them come out into awareness and then “kick the ... “ out of them and be free. The judge and censor in you is just a thought. It is not You.
Resources:
Who we are/EGO:
Elkhart Tolle: “Power of Now” and “New Earth” (books)
Nisargadatta Maharaj: “I am That” (book)
Lester Levenson: “Ultimate Goal”, “The Way” - audio in mp3 format.
Jiddu Krishnamurti - Youtube videos - check all, but start with ones describing desires, fears.
Image Removal/Letting Go:
Lester Levenson: “Sedona Method” mp3/book
Use experiences of people that got free and speak about it, to find Your own way to get there. Do not blindly follow anybody. Everything becomes easy with time and practice. Always trust in Yourself !!!