Easier to do in the micro's, limp in when you can, especially in LP. Learn to like getting the cheap peek, but learn to like even more that if it don't fit, git. That said, Omaha has such a huge portion of chase in it, that post flop evaluation is more important than in HE.
I prefer O8, which allows me to peek even more, and in those sessions where I have no problems gitting out of a hand, I do pretty well.
Remember, especially if you are a holdem player, that each Omaha hand is roughly the equivalent to 6 holdem hands. For yourself that makes things that much more complicated, but don't forget that at a 6 max table, 5 other players have 6 hands each, so you are up against 30 hands!
If the flop hits you hard, don't hesitate, bet it hard. Never slow play in Omaha. Preflop I would suggest Potting AAxx from any position , but pay attention to a flop that doesn't fit with your hand and drop fast to any resistance. You will run into a lot of players who know that their flop of 2P has your AA beat...
Other than that, I'll go with coordinated hands as the basic guiding rule. Count how many of your 6 preflop combo's can develop into a winning hand. 34 suited could of course turn into a St8F, but it is so unlikely as to not really be counted on (unless you play PLO8). T9xx s on the other hand has a lot of play. If you can only count 2 potential winning combo's you probably should not be playing that hand. I think I prefer JT98 ds over AAxx. Even with a gap like QJ98ds I would see a flop against a known AAxx happily, and at almost any price.
Be wary of connected rainbows. Seldom if ever play a XXXY hand, where you start with 3 of a kind in the hole. Chance of improving is miniscule.
For even more insanity, a local casino runs a 5 hole cards PLO8 game on Saturday mornings. Each hand = 10 Holdem hands.....The nuts are almost guaranteed to occur. But the cheap peek becomes more important.