Do not remove any paper until the entire block is finished!!
Trim sections to include 1/4" seams on the side you're sewing together first.
Only trim the sides you're working on.
After stitching 2 sections together, trim the next side.
Match sections where points in the pattern come together.
Insert a pin straight down through both sections, matching the points.
Hold the pin exactly vertical and insert pins on both sides of it to hold the points in place.
If you're stitching over a lot of seams using a basting/longer stitch first is a great idea!