Tobu is a free application for Windows that will allow you to create notes and save them in an organized way. Yes, an organized way because it offers us a good text editor more powerful than the usual ones ad the feature that allows you to tag the notes so you can find all the notes of certain kinds when you'll need them.
Open several notes at once thank to the tabbed browsing system and read all of them. Access them easily and erase them when you won't need them any more. All this makes Tobu to be a good choice if you need to take lots of notes and find them easily and you are not used to Post-it methods and programs.