Daily if I can. Always before work. I never look at a clock to see if I have time to 'finish a seam', I just start sewing, and stop when I need to leave, leaving the fabric under the needle, then just start again when I can. I keep UFO's bundle and ready to pick up if we go camping. I keep handwork, yo-yos, etc. in zip-lock bags ready to go with me when we driving. I agree with everyone that said those 15 minutes add up.