When it is time to leave a note, use a note shaped like a timepiece. Something like this Sticky Note Wrist Watch.
These wearable sticky notes for your wrist are perfect for reminding yourself about things that you need to do. You get one pad that is shaped like a watch consisting of 100 sticky notes. It’s a fun way to use sticky notes.
These make a great gift for anyone who loves novelty notes and likes to wear paper. They are only $14.99 from Amazon.com.