I personally think that being honest really works.
About a year ago someone called me on the phone about 11 in the morning. I grouchy answered:" Yaa, Piano lessons? More piano lessons? I need some rest. The studio is closed. Yaa. Till noon.". I knew I have secured the student on the spot with that sleepy-grippy answer, because I've heard a healthy awake giggle on the other side. She was a bright lawyer looking for a piano teacher for her kids. 2 girls. The older is superiorly expressive, the younger is a wonder kid ( she is a genius, not less ).
I always schedule free interview. I never think of it as an interview one way. We both have to rock each other boat for lessons to work. On the interview I am the aggressor, but also feel as if it's me who's being interviewed the most. I ask million questions. I play. A LOT. My interviews cost as a minimum $200, but it's free. I invest whole a lot in to interviews. More then I invest in advertisement. I tell the parents that there will be up and downs, tears, you are here for the long haul. Playing is fun, practicing is dreadful. I tell them - " I hate practicing sometimes. Sometimes I do not feel like it. Sometimes it is somewhat enjoyable". I play again, smile and say " See, it's all worth it at the end". Did I stress enough how much I play?
I find the whole idea of dressing fancy don't get me students that I want. Few years back I would not wear slacks to interview or lesson, today I don't oppose jeans. Scarf is for the weekends. Look like your client, think like your client, joke like a client you want. Know what your client is seeking. Don't offer more then you can give. Don't lie.
Marketing is a wonderful science.
Get your self a stage name. I am Russian, but was married to some unknown Brit. He had a very fancy name. I took it. My own was 13 letters - impossible to spell or to pronounce. Funny accent works wonder in combination with fancy last names.
Be fun. FEEL fun. Remember how fun it was to play something so simple for the first time in your life. If you can not, please play for a living. I never thought I'd teach. It was a miracle how I've got to it. I had no kids of my own, so I always thought kids were dumb.
You have to first to learn enjoy the company. The purity of it. There is nothing like it.
I will sincerely go out of my way to find an arraignment my student wants to play after a year. I do not overdose them with Bach at 7 or 8.
Be different. Stand out. Look for someone who is in it for a long haul. Look for " Crazies". Have something to share. You'll find them. It's very rewording.
There is an incredible competition in my area. My little hole is very famous for best education in US. It's pricey/cheap, but still the best. I gave my first paying lesson at 11... To rephrase your question it is not really a shpeal ( why does it sound so jewish?)
It is not really Jewish thing or marketing, You have to believe in what you sell. If you do, you should not have any problems.