whether I resew them or not, really depends on my mood and how 'fiddley' the project is. I have been known to fix a TON of them..and on the next project press the living daylights out of it! When I am sewing rows of blocks, I usually don't pre-press the seams. I keep track of the row before and use a stylus or purple thang to adjust them as I go. It takes a few seconds longer to sew the seam, but I am not having to pin the whole thing. (and yes, sometimes I pin the whole thing! I am an ADD quilter!)