I am still horrible with triangles. One of the ladies in the guild taught me to cut them so they come out right. It's all about finding a cutting and measuring style that works for you. I started piecing with simple patchwork squares, nine patches, etc - no triangles, just worked on seam matching. Then I moved up to things like shoo fly, churn dash, and friendship stars. I'm just starting to try some of the patterns with more triangles now after almost 6 years of serious quilting.