Dear OP, above this post you'll find a great deal of good advice on how to tackle crosswind landings. Now see how NOT to do it.
This footage was a landing competition day held 2 years ago. I was there (I flew that day but my landing is not shown). The pilots you see range from very low time students to PPLs with 100+ hours. What you don't really see is the terrain and treeline upwind causing quite a bit of turbulence on very short finals (and on climb out). That does not excuse the poor landing technique shown. I want this to be a learning exercise for any student pilots reading this thread, not a willy waving match about how superior your skills are, or how poor crosswind landing techniques are being taught in my neck of the woods. This film was edited to show the worst cases, so keep that in mind when forming your opinion.