You can sew two strips together and open and iron them open Then take a square template and set it on point ( opposite corners on the seam) and cut out with your rotary cutter. After you get to the end of the strip rip out your seam and match the other sides face to face and repeat cutting out as many as you have room for. Using a 3 1/2" square template you will get about 5 out of two 14" strips sewn together. The time saved will be worth it. You can see how to set the template on the fabric on my free teaching site
http://www.bitsnpiecesworkshop.com on the half squares link.