Colorful, cute, convenient

I love the little colorful sticky tabs.  There are SO many, and SO many colors! You can write on them, but you have to make sure you have the right type pen.  I can't tell you what penexactly to use, because it was a trial an error for me.  Some gel pens work, but then they smear.  Some ball point pens work, while others don't.  I really like using them without writing on them. And just color code things.  As far as clipping them into a spiral bound notebook, I haven't found the perfect fit.  The double spiral doesn't work so well. And some of the single spirals are either too close together or too far apart.  I have a portfolio though that has a little pocket that they fit into perfectly.