I cashed (#3) in one the other day, field of around 100.
Basically while the blinds were relatively small, if I could limp and close the action with a marginal hand, I did so. Otherwise I just played my big hands aggressively.
I noticed two players using a kamakazi strategy which after 4-5 rebuys had managed to land them in the chip lead, these players all busted out at the start of the final table.