Consistent Success playing NL MTT's

I see a lot of guys playing mtt's and being successful at them conistently, finishing at the final table all the time, online were talking. I enjoy the multi table tournaments the most out of any structure, and I am somewhat successful. I play in the lower buyin tourneys at stars with anywhere from 1000 to 2100 ppl, and i finished 3rd in one 1200 person which is my best so far. I see people on pokerstars who consistently finish vey high in the money and usually more often than not the final table. I have read harrington on holdem and try to follow his advice but it is tough on the internet because you don't have as much time before the blinds eat you up. I usually either last for 3 or 4 rounds and then exit, or I finish anywhere from 70-200 place. I would like to read some advice from players who consistently make it to final tables on the internet and see what strategy they use to make it through the beginning and the middle of the these large tourneys and make their time worthwhile with the big payouts. My final table play is pretty good once I get there. A link to an article would also be helpful. Thanks.