Something that I have never done before I started following Melissa's blog, is trim my half square triangles. As you can see above, most of them have been trimmed, but some haven't (I will remedy that before I sew them into the blocks!). Since the first time I trimmed them with her last quilt-a-long I have always trimmed them!
I'm always surprised that no matter how carefully I cut, and how precise I try to be with my 1/4 inch seam, they are nowhere near perfect!! Trimming not only makes them the perfect size, but gets rid of those annoying dog ears, that get in the way when sewing the blocks together!
If you want tips on how to trim your half-square triangles, Melissa has a fantastic tutorial over on her blog.