Finish one meaningful thing before collecting ten more exciting beginnings.

New beginnings are pleasurable because they contain no difficulty yet, and collecting them can feel like productivity while producing nothing. One completed meaningful project changes more than ten exciting starts, and the excitement of the ten is largely the reason the one never gets done.

When a new idea arrives mid-project, write it down and leave it. Return to it after you finish. Most will have faded, which tells you what they were.