I'm sorry noone else has replied to this yet, I've only just seen it!
I would strongly advise you to get on the PHA section of this forum with hands you aren't sure about. There is a vast amount of experience hanging around blonde from pretty much every area of the game, who are more than willing to share their knowledge with you. Also, if you haven't already, grab yourself a HUD and learn how to use it. More than anything, it will help you to identify the situations where you have leaks, and by asking people around here we can start to correct them. Reviewing is so important, and if you want to take poker as a serious way of making money, studying is very important. As daunting as that may sound, it's actually very rewarding and can be a lot of fun.
I don't know how many comps/tournaments you've played, but I do think it's worth explaining the reason behind some of the "play loads more hands" comments, despite them often being very badly worded. Basically, variance. It's perfectly possible for a winning player to be losing over 150,000 hands (even a player who is completely crushing the stake he's playing at) and similarly, it's possible for a losing player to appear to be crushing by winning the lot over like 50k hands. The more you play, the more this variance evens out, and the more information can be gleaned about your tendencies and potential areas for improvement, as well as a more realistic idea of how good you are. I, for example (as primarily a cash player) will need to play over 200,000 hands to be 95% likely to be winning at the end.
Bankroll management is also very important for a lot of reasons, but partly to help balance your emotional state. Tilting just happens, dealing with it is very difficult and very important, but if you're starting with a small bankroll and tilting it off after a mincash (I like mincashes :p) then something is going badly wrong, either with your mentality or with the stakes you're playing, or both. Look up some stuff, be a nit, win money, good luck at the tables
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