Hi all...
I was in an online tournamentwith about 400 people and I came back all the way from less than the big blind (had about 1,200 chips vs. 1,600) to finish third. One spot from the blind, I went all in with pocket 4s. Somehow, I won a four-way pot without making a set, quadrupling my money. At one point I was the stack leader at the final table, but ended up getting burned in a showdown with JJ vs. A 10. still, third was pretty good.
So remember, you can always make a comeback. I don't believe in being pot committed. If you are down and invested heavily in a pot, don't call all-in just because of that if you know you are beat.
likewise, I've gotten burned badly playing too many hands with a big stack. Once you are a chip leader, you should only play if you are going to raise. and then push people around but be willing to get out if nothing hits.
If it's late and everyone is extremely tight, punish limpers (people trying to limp in with K 10) by putting them all in with pocket 9s or something.