These are the clear acetate sheets that most pre-glued embellishments and stickers come on. Instead of trashing them, I collect them! I have a small box of different sizes and lengths. One of the sides is always coated so that stickers come off easily and that makes them really easy to work with. I test out all of my titles on these sheets before putting them down on a layout.
I don't always want a straight title, so I'll just use the clear acetate to see how the title fits in the space. Other times (like above), I want a perfectly straight title so I place the acetate on top of a piece of grid pattern paper and then line up my letters. This makes getting the right spacing and straight lines a snap!
Here is the finished product and a sneak peek at the layout that I'm currently working on. Hopefully, I'll finish it tonight and have it up tomorrow.
And thanks to Callie for the great question!