I will talk about post-it that you could find anywhere and any time .
The post-it is important to me and other because it would remind us with thing we need todo. Also you could use the post-it to give your friend you email and other things. Some schools use post it in reading to keep writing what you like ,dislike ,connection , production,and etc.
Every body will use the post it in deferent ways. So use it your way!