Being Low Stack

It seems whenever I take an early chip lead I tend to loose the tourney I am in. But once i am short stacked I come back and take down the entire thing. I think the reason for this is once i am chip lead I don't play in as many hands. I let the others do all the work. I need to be more aggressive when i have the lead. Also, on the other hand i get more aggressive in short stack because me going all in is a welcome to the chip lead to call. Everyone wants to be the hero at the table to burst that bubble. Or get closer to it. Remember just because you are chip lead doesn't mean you have to call everyones all in. That is what happened to the person who had the chip lead the entire game. they kept trying to knock people out and losing.. not even making it to the payout. Well that's it for now.