15 minutes to a second wind!
When I really want to sew after a long busy day and I'm bone tired -- I try to catch a second wind. What works for me is telling myself - just do SOMETHING for 15 minutes - sweep the floor, do the dishes, throw some laundry in lol something!! Before I know it I'm in my sewing room stitching away! Better than laying on the couch!!
What works for you?