I am a former "Fly Lady" follower too. I gleaned from her some really good tips and from time to time when I get bogged down, that 15 minute thing is perfect! And yes, indeed it does work for all the reasons mentioned by Margie 77072.
I have never applied it to quilting because I have the opposite problem. I start quilting and forget to eat, not a true problem, grocery shop, pay bills on time and clean the cat box.
Try the mighty 15 minutes and let us know if it works for you. Be encouraged, we are with you.