There are Four betting rounds in Omaha :
PREFLOP : You are going to be folding a lot before the flop. A LOT. Even with the starting hand suggestions here (which in many ways are not appropriate for a higher limit game) you will be playing very few hands, especially in early position.
FLOP : This is where you'll get a good idea where you stand and whether you want to push the pot with lots of raises or get the heck out of dodge. There are some specific things you need to be looking for on the flop...
TURN : The turn in Low Limit Omaha often plays itself, that is to say that on the turn you usually know whether you still are winning
RIVER : The board is a sentence, the river is the period (or explanation mark!). To get here you've had a good draw (and don't kid yourself every hand you had on the flop and the turn has been a draw.
