I still have problems, been piecing and quilting since 2005. My biggest problem has been that I try to sew fast because I want to hurry and get the top pieced so I can get it quilted. When I slowed down my sewing about half, my 1/4 inch seams are MUCH more consistent. Along with nesting and pinning where seams join AND last but not least, squaring up my blocks as I go. Still not perfect, but I am happy now. Every little tip you get from friends and teachers is gonna make you better and happier!