When I take a commission it usually feels like a must-do work, too, and I struggle to get it out in a timely manner. Therefore I usually only allow myself 2 a year and I try not to start any other larger projects during that time, just to make myself keep with it. I also make a signed detailed contract with the buyer.
When I retired I promised myself that the "got to's" were not going to get to me.
Jan in VA