Dear one -- if it's not your propensity to be a single minded quilter, you simply will not succeed. There is no discipline, it's simply the way one's brain was designed by the creator (who was Himself given to making many things of a day).
You describe yourself as one who prefers to have many irons in the fire, so a more fruitful topic of discussion for you may be how to juggle irons without getting burned or dropping them on your toe.