Hello everybody! 
I'm an organ student, planning to audition at the conservatiore in january 2012.
I'm quite confused about technique, and after reading a lot of excellent posts here, i decided to ask, hoping for some help.
I've played the piano for around 7 years - along with violing and singing, which of course in the end made me downprioritize all 3 things a bit. I've never practised scales and exercises in a really controlled fashion - it's always been the last thing i wanted to do - i'd much rather improvise of practise the actual pieces.
A couple of years ago, i started playing the organ, and that made me realize that i missed a lot of technique. It is said that playing the piano prepares you for the organ, but that the opposite isn't necessarily true. I really felt that a needed more technique - i was very confused about how to play pieces, whether to use my arm, wrist, or just my fingers.
Everytime i played pieces with scales arpeggios, it was very hard for me to learn them, and even harder to play them without mistakes. I practised a lot, and in the end i learned all these pieces, but not without a lot of tension.
My organ teacher has just repeadedly asked me to pratise slowly and so on, and i do that a lot, but some times it really seams like an impossible task to get a piece perfect.
The reason i'm asking my questions here in a piano forum is that i realize that i have to get my technique straight on the piano if i wanna have any chance of keaping up with the demands of the conservatoire.
Currently, i (almost) only have tension in my right hand, after putting a lot of effort into loosening up. I tense a bit everytime i play something really fast, especially trills. I try to remove that tension in very slow tempos, but it's hard to get totally rid of.
I could ramble around for many pages about what i've tried, but i know that in the end it's propably just about me getting it together and practising slow, and maybe start really practising scales and arpeggios.
I think my main problem is that i'm an extremely good sight-reader, and sometimes i just don't want to practise something slowly that i almost can play (and certainly read) in tempo.
I'm practising between 2 and 5 hours a day on the organ, and very little on the piano. I cannot accept having anything physical limit me as a musician, i will never get happy if i'm just barely able to play difficult pieces. I really need to get "past" technique, if you know what i mean.
So, i ask all you clever people: What should i focus on - playing music, exercises, or both, and how do i get rid of tension and end up with a "natural", easy technique?
PS: Some of the things i'm really bad at are quick scales and arpeggios, and everything "pianost"-like - hand movements, wrist movements, using force from other places than the finger to play notes, and so on. Please don't slam me if it seems like i never practise slowly, i do that a LOT - i just feel like i'm beeing braked by the impatience i've had earlier while playing the piano.
-Jonas from Denmark