Depends on the project - but if it's not just dead simple, I will cut and sew a block to make sure it goes together well - then if all is good will cut everything, but then like to sew my blocks in groups. I'm working on one right now that is a big, somewhat fussy block, and I prepare them about 3 at a time. I'm a one project at a time person, however I help a good friend who visits often with a disability which requires my help quite a bit, so between us, we may have several projects going on.