T.J. Cloutier in his book "Championship No-Limit & Pot-Limit Hold 'Em" with Tom McEvoy makes a great point that I try to keep in mind in ANY tournament situation, whether it's a freeroll or a cash buy-in.
"It's all about survival."
You can't win if you don't make the final table. His goal in tourneys is single-minded: to make each break with more chips than he had at the last one. One chip or a thousand chips, it doesn't matter. Just be patient and add to your stack. Stay away from hard decisions. Muck the coin tosses. Put the pedal down on big pairs ONLY. In short, keep it simple. Takes a lot of pressure off your game.
P.S.: I read "Super System" and tried Doyle's philosophy of "attack, attack, attack", and "stab at a lot of pots". God bless him, he's The Man, and he's made millions, so far be it from me...but I nearly went broke. I prefer slow and steady to constant skirmishes.