Hi Hip Hop -- If you are talking about those times when you are down to the felt in a tourney (of any size), desperately build it back up to a competitive stack (mostly thru luck), and then lose it again before the money... it is frustrating.
For me, the problem is that I have typically been playing either a good deal more loosely than normally to try to get chips, or have been a luckboat for a few hands in a row. Extreme luck has a way of mucking with my head. So, instead of being grateful that I am now back in the game and tightening up, I sometimes push my luck. And suddenly the luck deserts me, sending me to the lowstack again, from which I may not again recover.
It works best to revert to tight play. For one thing, the other players are now sure you are playing loosely (and they are correct.) So you need to not be. That way you can make additional gains because you now are playing with great hands that have a greater possibility of winning-- and people are calling you with lesser hands because they think your range is what it was. Surprise!
Controlling your self and your reactions is what will see you through.