beginning of the tourney, play your monsters (AA/KK) very aggressive. i see a lot of players calling 15x bb raises (from 10 -> 150 raise) with pure trash, so raising that much helps to limit the amount of callers and lets you isolate 1/2 people. play very tight and play your hands aggressively. don't get caught trying something fancy early.
2nd half, as blinds increase, you should find yourself stealing more and making more moves dependant on shortstacks and players youve noticed are playing too tight (as you have been). youre looking to either dominate by the time the FT rolls around (top 5 around bubble time) or bust out. like welly said, just 'making it in the money' is -EV in the long run. you're looking for top 3 if at all possible.
when the FT finally hits, you treat it like a SNG. let a few short stacks do their stupid any-two all in thing, as the field narrows start loosening up again and take control of the table.