I've played about 6 freerolls at PS (granted thats not many but I'm a beginner as well ), MTT with about 5000 entrants.

I try to do exactly as chadrian says, super tight, and let the field come way down.

All six of my tourneys I have got to the top third and into the second hour ... but once the second hour comes around I get dominated by people that have already built a big stack and I bust out.

I need more practice