Hi there I am doing HST at the moment on a quilt for my nephew and have read and watched a few videos on them. One video was from Jenny at the Missouri Quilt Company and I though it was a pretty good idea. Make sure your suares are cut the same size and join them together WS facing. Take a 1/4 seam all the way around the outside of the block and then cut diagonally across them and you have two HST. Really easy method I thought. It is on youtube if you are a visual leaner like me. Just wish I had seen this video before I started cutting my out
Good luck.