re: Poker & Deep finishers in MTTs
Here's my recent tourny stats by way of credentials for the following
There is a huuuuuuuuuuuuge difference between opeining a pot and entering after someone has bet mid-to-late in tournies. In general don't be afraid to open pots in mid-late position with a reasonable range of hands (depending on the tight/looseness of the table) but be extremely cautious about calling for a decent chunk of your chips preflop.
As for WA/WB, it is absolutely true but do not overuse it in tournies. Generally don't be afraid to bet pots where you think you are ahead after the flop and let the other guy make a mistake. Avoid giving people the opportunity to bluff you off reasonable post-flop holdings by checking or weak-betting flops, you also want to avoid giving free cards. Better to take down half a dozen decent pots and the occassional big one than to walk into a bear-trap by being passive. This also provides you with the correct image to make the occassionally required huge bluff (hopefully a semi-bluff) when you perceive weakness, this can often be the defining moment of a tourney. By the same token be aware that people are prepared to make big moves if they perceive you are weak and that you should avoid encouraging them to do so.
Consider carefully the size of the stacks you are playing against and if in doubt don't get involved in marginal situations versus big stacks, while at the same time target the small stacks who are having to make a decision for their tournament life each time they enter a pot, this often gives you huuuge fold equity (unless they are pot committed). Your own play should also be influenced by the size of your own stack and how others are perceiving your own state of mind.
There's also a completely different approach once you reach the final 10% of tournies where many people start panicing and a bit of concerted aggression can boost you up the order without much resistance.
It also depends on the buy-in of the tourney as the tone of your approach, $5 very different from $33 very different from $100.
Finally stealing blinds, restealing from the stealers learning how to defend your own blinds are key and that's a really long post in itself.