I learned how to chain stitch when I got my serger. That's what you do with a serger; put the next piece in as soon as the current piece is just past the needle. Then I took that to my garment sewing.
First I sew the two shoulder seams, one after the other, then the sleeves go on, then the side seams, all in one long sew. Some other things can be sandwiched in there also, as sewing the gathering stitches at the top of the sleeves in between the two shoulder seams; working on a collar or cuff at the end of any other seam. You can put a whole blouse together without ever pulling out and cutting the thread. That is really a thread saver and nothing gets jammed up.