Landing crosswind is just a matter of being able to fly a wind corrected straight line down the runway. The problem is that as you slow down, the cross wind is going to take the plane further to the downwind side. As the plane slows down, you must turn the plane further and further into the wind direction to maintain your approach line. This is where most people get in trouble. They are so used to turning the plane by banking and pulling, that they do this instintively.

What you must do is keep the wings level (or keep the upwind wing veryl slightly down if its a dihedral wing), and keep adjusting your heading with the rudder. Adjust your heading such that it counters the wind effect. And keep the wings level. Did I mention keeping the wings level?

Practice slowing your plane down and flying the wind corrected line a few mistakes high. You'll get the hang of it.

Practice, practice, practice. And remember its better to go around than turn a bad approach into a disastrous landing.

Brad