Don't forget to check the Archives!
I wondered why my threads never showed up in the main page of the Digest. One day I was checking the Archives and lo and behold there was my thread. I hadn't realized that only some threads go on the main Digest page and the others are in Archives. So now I don't even check the main page, but go straight to the Archives so I don't miss anything. Anyone else not know this? Well, now you do.