Bluffing

While bluffing is much easier when playing online poker heads up, it's very important to remember that it's DANGEROUS! It is often necessary to read your opponent and know what draw they are on. If you suspect them of having trips, and there is a possible flush showing on the board, go ahead and try to bluff them out. Usually they wont call because they think you have the flush. Just make sure to place the right sized bet.

A good way to get an aggressive player to fall for this, especially more than once, is to play heads-up as though you were an amateur. Heads-up is the longest point in a poker game, so you'll have plenty of time to make this guy think you don't know what you're doing. Fold all of your garbage hands for a while, and only call or raise when you have something killer. This'll make it much easier to bluff the guy later on.