How to make a rag rug and repurpose fabric

So, I had bags of clothing that I didn't need and that were too worn to donate and I thought I needed to do something with it that didn't involve filling the local land fill, so I started making rag rugs.

What I did, was I took the rags (in the picture above, I used an old queen sized sheet) and I cut the seams so I could lay it flat. Then I started on one end and measured up an inch and cut all the way to about an inch from the end, then measured an inch up from that cut and started cutting the next strip. It made the rag into one long strip. Then, using a size "P" crochet hook, I made a chain of about 10 stitches. then doubled back and crocheted each chain to the end, added about 3 extra sttiches on the end to turn around, then crocheted in the back of each stitch, forming an oval. I just continued crocheting, adding a couple extra stitches at each end to make the rug lie flat and used up the rags. At the end of the work, I wove in the tail and then added a couple stitches with a needle and thread to give it a little more strength. I'm working on a rectangle shaped rug now.