So many advices, but i don't think anyone have mentioned, that if you traded for a while more or less successfully, and someone wants to to give you his money for you to trade, think twice! And NEVER give guaranties (better to take lees commission rather then that).
For a novice, I would also like to advise never trade more than what you can afford to lose. I read this out on one of the trading websites I use and it is a very good piece of advice. Honestly taking it casually can bring some loss so better to take everything serious in this profession.
Trading is fun and somehow easy if done with a calm mind and serious attitude but remember that it is a challenging and risky game also.