Well there is a throwaway involved, but this is more of a tip because I'm not creating something with it, just using it to help creating something else.
What you see is the leftover sheet from stamp labels. It's a glossy paper that you peel the labels off of which is how I got the idea to use them in this way.
I removed all the excess sticker pieces and take my red line tape and lay it out in rows. I load up the paper and then when I'm doing a project I can just go and cut the paper and tape all at once to the size that I need. It does help things go a little faster.