Today's Scrapbooking Tip involves corner rounders.
I use mine often for mats, photos and the edges of some of my chipboard albums.
They are also useful for making quick and easy tabs.
I use whatever scraps I have, cut them 1 1/4" x 1 1/2" and fold them in half. Use the corner rounder to cut the two ends of the FOLDED piece and voila, you have a matching tab.