Have a headache/migraine? Submerge your feet and hands in hot/warm water and put a bag of frozen peas at the base of your skull. The heat on your extremities pulls the blood from your head relieving some/all of your headache.
Every January, I turn all of the hangers in my closet backwards, like this. It takes about 60 seconds: Each time I wear an item, I hang it back up in the normal fashion, which takes zero effort to remember or do. In June, any item that is still hanging backwards has not been worn in 6 months, and I usually donate it to Goodwill unless I can come up with a good reason to save it.