|I just completed my first project that had gathers. The way the pattern was configured, there were two rows of gathering threads, a row a of basting, and another row of stitching. I was sewing with black thread and was really confused as to which threads to pull to make the gathers under the bust area. Long story short, I messed things up. When I re-did the gathers, I used a different colored (brightly, in my case) thread. It was easy to tell which were the gathering threads.
I hope this tip is useful to someone! I'm kind of new to sewing, so I don't want to post a dumb tip!