Particularly earlier in the year, running too many big bluffs in
tournaments was a substantial leak of mine. I've made a concerted
effort to confine the monster bluffs to the cash tables, and my tourney
results have improved a bit. In the $300 rebuy 6-max FTOPS, though, I
did pull off what I think was a big, good tourney bluff:

Full Tilt No-Limit Hold'em Tournament, 80/160 Blinds (6 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

UTG (t6916)
MP (t3171)
CO (t7325)
Button (t12320)
SB (t12015)
Hero (BB) (t6713)

Hero's M: 27.97

Preflop: Hero is BB with J, K
2 folds, CO bets t320, 1 fold, SB calls t240, Hero raises to t900, 1 fold, SB calls t580

Flop: (t2120) J, Q, 5 (2 players)
SB bets t900, Hero calls t900

Turn: (t3920) A (2 players)
SB checks, Hero bets t999, SB calls t999

River: (t5918) 5 (2 players)
SB checks, Hero bets t3914 (All-In), 1 fold

Total pot: t5918

Results:
Hero didn't show J, K (nothing).
Outcome: Hero won t5918

Preflop is definitely good. The CO's range was like 75%, and I doubt
he's capable of 4-betting light. I don't know much about SB but it
almost doesn't matter.

Flop I think is close between shove and call. My hand is almost
always best, and while I'm in bad shape vs. his calling range, there's
also a lot of value in picking the pot up now given the spades out
there. I called only because I thought he'd give me the information I
needed on later streets, and he did, though not in the way I'd expected.

I doubt he checks a good spade on the turn, but he may well have
turned a weak flush or a better pair than mine. So I throw a little bet
out there just to see if he check-shoves. When he doesn't, I'm pretty
confident the pot is mine on the river. For a second, I worried about
the board pair, but then I realized that there were really no boats
possible for him except for maybe a disastrously played A5.