I don't know which site I learned this but it works very well. If you are sewing a sashing on and it is cut to the correct specifications but still seems to grow when sewing it one, I put it on the underneath side and the block so the feed dogs will pull it along where the top (presser footO can cause it to stretch. No more trimming needed. When sewing 1/2 square triangles or 1/4 square triangles, I use a glue stick to match the points, use clips instead of pins to hold it in place, then sew where I can see where the seams cross and sew just to the right of the intersection. I like to use an open toe presser foot for sewing pieces. Also I found the tape which shows the center line which goes under the needle and the 1/4 inch for the seam. This helps guide the entire piece with the 1/4 inch instead of just by the needle.