I was looking on Pinterest today for papercrafting techniques, and found this free downloadable sheet that lists how to get the most cuts out of one sheet of paper. For example, if you have an 8.5 x 11 sheet of paper and you need to cut it into 2x3 pieces, which side of the paper should you make the 2" cut along and which do you make the 3" cut along? It really makes a difference believe it or not.
This sheet, which can be found here: http://simplysimplestamping.com/stampin-gals-gone-wild-wednesday-the-ultimate-paper-cutting-guide/
will tell you the best way to do this and get the most pieces out of the one sheet without wasting paper. If you go to the above link, you can download the sheet without the watermark on it.
It's good to take some days off from making cards to do research on Pinterest. Hopefully it will pay off in the future. I know I'll keep this sheet handy.