First of all, congrats! I have a three month old, and all I can say is that you just learn to cope. I've realized that some of my goals are going to have to slip for the time being while I care for my wonderful little girl. As for exercise, planning makes all of the difference! I bike to/from work or exercise over lunch, while my wife works out after work while I pick our daughter up from daycare (we alternate days). On the weekends we use a jogging stroller to get our hearts pumping while the little one snoozes away...