Well, I might play super-aggressive in the early stages (like the first hour or two, depending on the tournament) and then loosen a bit in the middle stages. And go back to tight in the last phases (like the 20-30 players left).
That or, I play super loose from the beginning and keep tightening my range as the tournament progresses. So, I become super-tight in the last phases.
But that's just me. As far as your game is concerned, I think you need to find your own place. You have to know which style suits you better (whether playing tight in the early stages or loose, and mix the game as you go) and keep doing it. You'll find your mojo.
Best of luck!