Hi Cardsking i take it from your post you haven't played a lot of large field tourneys and you want a good chance of running deep.
Start tight taking advantage of your good
hands until you get some idea of your opponents, which might not happen for a while due to moving tables too often.
As the blinds increase start to open up your pf ranges a bit from late positions and try to workout who's blinds should be the easiest to steal.
When the antes kick in depending upon your stack you might have to start stealing with weak holdings to stay in front of the rising blinds.
If you ever get your stack down to around 10 M (10 rounds of blinds & antes) you should be shoving weaker hands the later your position at the table or blind vs blind shove almost any two cards.
You might want to avoid battles with short stacks and monster stacks when it gets to shove or fold time.
Good luck bud is there a specific area that's giving problems?