[The Big Easy]

I have a lot of experience playing 15-30 and 25-50 Limit Omaha Hi at Harrahs in New Orleans. I think the advice of most of the above posters is dead-on.

Most games I have played in are very passive pre-flop, so you can play pretty much any hand with a suited ace b/c there will usually be 6 or 7 players seeing the flop for one bet. Fold hands like 9987, T987, or 8765 DS or not. In general, sets are losers at the river. If you flop the nut flush draw and the board pairs on the turn with 4 or more players still in, dump it. Someone has the nuts 90% of the time. Fast play top sets with a big flush draw or gut shot (you have the best hand + either the best draw or blockers to someone drawing to the nuts).

But most importantly, your win rate will be determined at the river. Learn to throw away your J-high flush that happened to hit while you were playing top set.

In closing I have one word of advice: VARIANCE. Expect huge swings.