I'd switch back and forth for variety. When I get bored of one, then I go to the other method. If I don't want to think all the time, then I'd lay the pieces out & chain sew them. Then when I want to use the right brain, I'll stop & do 1 block at a time. I also have smaller projects, like the tissue covers, all cut out ready to go for when I want a break, really don't want to think or get tired of looking at the same project.