Practice making perfect points with this sampler quilt along.  Hosted at Connecting Threads this skill building quilt along spreads over five lessons and walks you through constructing many basic blocks that are the foundation of many traditional quilt blocks.

I love the extreme detail that Ann's PDF download goes into for how to get your points to match up.  It's more than just getting your seams aligned, it's also being away or hw your diagonals match up and taking the time to be precise.