One of my favorite tools is my 13" rotating cutting mat, which came in so handy when I was making the Disappearing Hourglass quilt from MSQC for this year's family reunion quilt. I also have to add a possible favorite tool which I have not used yet. It's the Fiskars ruler with a handle with a rotary cutter that you press down on, instead of gripping like a regular rotary cutter. I'm surprised my DH bought it for me, however, with my carpal tunnel and painful right shoulder, I'm hoping it will cut down on pain issues when rotary cutting. I had seen it on a couple of tutorials and I just had to have it, so I'll let you know how it works. I considered it my 46th wedding anniversary gift from DH.