If it is a quilt for a homeless family, I don't measure the quilted quilt through center and both ends and square it. I don't have a big table and I can't get on the floor. It's seldom off more than a fraction of an inch anyhow, so I just bind it - nicely. I will have to remind myself to measure on quilts for myself or competition.
For homeless family quilts, I often do string quilts, flip and sew, and this means every seam does not have to be exactly 1/4 inch until it comes time to sew the blocks together to make the top.