I simply pin. No basting or glue here. When pinning intersections I put a pin straight up/down through the intersecting seams, top & bottom. Hold straight then put pins through both layers on either side of the up/down pin. Works for me. I do pin long seams fairly loose but sew slowly enough that I can wiggle edges as I go to get everything straight. Of course, it doesn't help when you forget to move the needle to the 1/4" setting on the machine! Make really nice seams the wrong size and have to rip and re-do. Grrr.