I've finally figured out one key tool to working/parenting at the same time: the baby gate. I confine kid to his room and let him play in there while I'm writing. It's a small apartment -- his doorway looks out into the living room, where I work. So if he needs anything, he just has to peek out and ask. We're still together, but he's not trying to climb around in my lap while I try to make turn developer-speak into English for Macworld's readers. Very helpful.