When Things Calm Down

When things calm down at my house, like right now, both girls asleep, I never know what to do with myself.
Exercise, hmmm.. too loud, my big body bouncing will wake the children.
Clean, well why torture myself.
Read, zzzzz..... too tired.
Mindlessly search the internet, yup!!
I wish I had the energy to do something productive, make myself a better person in some way. Clean my house, make scrapbook memories, bake perfect cakes, read great literature.
But when the girls are asleep I just find myself aimlessly and quietly wandering the house. Could this be why my home is in such a messy state? Probably.
I know many mom's who have made amazing scrapbooks of their children, other mom's have really really clean houses, I even know one mom who has started her own at home business. What do they know that I don't. Pills, alcohol, what? what? Where does the pep come from, the energy to do such things???
I know that Jordan and Janelle are happy and they really don't seem to mind the messy house but I just wish I could know these other mom's secrets.
Another thing about these perfect mom's, the productive ones, the ones who probably have dinner preparations going on right now, is that they all seem to flock together. In groups, they go place in packs, they stick together. While I wander the Clifton Park mom world alone.
If anyone out there can tell me, the secrets of these robotic women I would love to hear?