Played tournaments for almost 15 years now.
I used to play 20+ tournaments a day but after Black Friday I stopped playing entirely. Now I'm back and have been playing
freerolls when I have the time.
TAG will get you far in low stakes tournaments, but emphasize exploiting your opponents:
If your opponent likes to bluff, check some big
hands and let them hang themselves...
Against loose players, open up your value range, three-bet them looser, and value bet relentlessly.
Against tight players try to out-flop them cheaply if deep-stacked, or get out of their way when they raise and attack their blinds in the mean time.
Good luck to you!