I have found that it is much better for me to stay outside or go to town during hatch days. I have two clear-top Hova-Bators that I hatch in and I find myself standing over them constantly to see who has made it out. Not much gets done around my house on hatch days, and that's not good since I've been hatching 2-4 hatches every month since January. It's amazing how some that I don't think are going to hatch or make it out, still seem to manage somehow. And I have one hen whose eggs always hatch late. It's a wonder I have any fingernails left.
I recently bought a Brinsea Ova-Easy 190 (Cool machine!) and my husband asks why I still take the eggs out the last 3 days and put them in the Styrofoam ones to hatch. I'm like, "But, but...I can't watch them hatch in the Brinsea." That, and I also have partitions in the Styrofoam ones to help keep breeding pens separated.