Omaha is said to be a game of draws and redraws, so it's important to always keep improving your hand. Suppose, for example, that you hold K♥-Q♥-10♠-10♣, and you get a great flop: 10♥, 5♥, 4♥.

You’ve flopped a flush, although you need to beware, because it’s not the nut flush. You have also flopped top set. Although three 10s isn’t as strong a hand as your King-high flush, the set gives you a redraw to a full house.

Should a 4 land on the turn, you now have the top full house, and only need to worry about someone who has quad 4s (quads occur much more frequently in Omaha, although in a high-only game, it isn’t as likely that someone would hold a low pair like fours, because small sets can be just as costly as non-nut flushes) or someone who held either the 7♥-6♥ or the 3♥-2♥ (giving him a straight flush draw).

Even though they do appear more often in Omaha then in hold’em, you can’t live in fear of quads and straight flushes. If you make the top full house, you should bet it strongly, and only if your pot-sized re-raise gets re-raised by a strong player should you slow down and consider that you might be up against four of a kind (in limit poker, you should probably put in four raises before you decide just to call).

PLO pots can grow rather quickly, and while a weak opponent might make a big raise with a lesser full house and a strong one might make it to apply money pressure, sometimes discretion is the better part of valour. In hold’em, quads are so rare that you can almost always be excused for going broke when you face them; in Omaha, you need to at least consider the possibility once you face a third or fourth raise.

Whether you’re playing PLO or straight limit, your work isn’t done when you’ve flopped a good hand. It’s usually important to have some kind of draw to something better. You may not need to improve, but it’s the equity you get from these redraws that can turn a losing session into a winner.