QUOTE
good general tips for learning an instrument/practice tips
Off the top of my head...
Always, always have a 2B pencil (or softer - easier to rub out) and rubber where you practise. Making small notes on the music is so very useful!
Piano: When faced with a page of new, uncharted, seemingly impossible music, cover up everything except the first bar, and even some of that. Then learn to play at least the first bit, even if it's just a few notes. Promise yourself a treat if you make it through the first bar.
Learn about the history and mechanics of your instrument. Learn about how it works and who first made it. Learn how to service it yourself. I get so angry when I see people paying a fortune to have things done that are no more difficult than making an airfix model.
Draw up a practice plan. It's so easy to pick up an intrument and play it absent-mindedly while thinking about school/work/shopping etc, then put it down thinking you've practised.
Use your local library and photocopier to get sheet music.
NEVER, EVER buy books unless they've been well recommended. There is so much rubbish out there! Always check prices on the internet, especially from the USA. Books from Amazon.com are often half the price of those from Amazon.co.uk. The exchange rate means you'll be getting a bargain.
Join a band/orchestra as soon as possible.
Steve