I used to buy those Post it self-stick notes but not so much anymore. They always seem to be used up or would not stick enough! I came up with the idea of using Painters tape instead. It is very reasonable, especially at the dollarstore. Painters tape also is easy to remove from any surface afterwards! If a familymember has to get something from the store for me; I even stick it to the dashboard of the car! No excuses “I forgot” ;-)!