I kind of do like Mandyrose.
I also put out a statute of limitations on my hesitation (unless there's a pin external deadline). In this case, For example, I might give myself till Wednesday, "you won't finish unless you start. You won't start if your space is a mess. So put everything else where it goes, dust off the cutting mat, change the needle, oil the machine, press and starch the fabric, then start Wednesday, cutting the biggest pieces." I have to write those steps down and cross them off as I do them. That motivates me. By the end of the statute of limitations, I'm usually ready to launch.