cash or tourny?

In my opinion cash games are the way to make money playing poker and most decent players will mostly agree with me. Sit n' Go's are fun and profitable, but there will be variance in sit n' gos as well. Not sure how long you have been playing and what your sample size is, so really there is no way of knowing whether or not what you are doing is sustainable. Now that I have children and have moved away from Vegas I find myself playing Sit n' Go's a lot more than cash games, due entirely to time restrictions.

Now, regarding the above quote:  I'm not trying to be a dick with what I'm about to say.

• Tilt: If you go on tilt and can't control it until the point you are bust, you have a major problem. My guess is that you aren't a good player when on tilt. If you don't fix this, you won't make money playing cards.
• Bankroll: What in the hell are you doing playing a game you aren't bankrolled for???  That is just asking for trouble and could have been one of the main causes of tilting. No offense, but people who play at games they aren't bankrolled for are just praying they get lucky before they go bust. You leave yourself no room for error in this situation.
• Level of play: You need to find a level of play that you can beat. The lower level games may seem pointless to you, but if you can't beat all the "chasers" in those games then you have absolutely ZERO chance of beating people at a higher level. And don't fool yourself into thinking that better players will be a better match for you. If you can't beat the idiots, you can't win, period.
• Finally, make sure you evaluate yourself honestly. Many people believe they are good poker players and they aren't. I'm not saying this applies to you. Truly evaluate how you played big hands and what went right/wrong. Make sure a bad beat is really that and not a mistake you made somewhere in the hand. I've often found after careful evaluation that I often contributed to my "shitty" luck. But most of all, be honest with yourself about ability, bankroll and the levels you play at. Obviously you recognize that you tilt and that is a good thing. The first step is admitting you have a problem!  You'll be fine.

Good luck with you poker playing. I hope it goes well for you.