I love post-it's and the variety they have, including this pack of page markers.
I have always used torn pieces of paper to mark pages in a magazine or book that I am reading for future reference. The trouble is that a lot of times the pieces of paper would fall out or fall in between the pages where I couldn't see them. These post-it page markers are terrific because they have that slight stickiness that sticks to the pages, but can easily be removed without any damage or residue. I can also make small notations on the marker if I need to.
I not only use them for page markers, but also anytime I want to write a small note to leave on my desk or on the refrigerator. I like the variety of colors too, makes them fun to use.