when blinds are high, or you are in a tournament with inexperienced players, you really need to pay attention to the limpers in early and mid position, as they may really have wanted to raise their hand., but they arent the raising type, they just call or reraise.
AJ suited, SB, see a flop, then make up your mind, I wont raise in late position with early limpers, too many times I get KK on the button or in the blinds, to push all in and find the UTG limper has AA.
shortstacked, I either see the flop or fold AJs, I prefer to see flops.
AK shortstacked, I'd push in or QQ or better...
maybe even 3 3 or something, just to gamble