Advice from a pro (someone who knows what they are talking about)

[xTopdogx]

I find myself playing alot of freerolls (i know lots of newbs) but i overcome that. I always make the top few hundred or even in the top 50. Basically i make it 2-3 hours into it and then find myself not being able to make it over the ridge to the next level. Its kinda like I get to 15k in chips and then go up and down I assume because the blinds are bigger and I dont play many hands. Then ill get low and move in with AK or AQ or KK and get 4 callers and lose.

What moves should i be making later in the tournament or what should I do to improve my play so that i can move to the next level?