Switch off sleeping late with your mate; he can take your child on a doughnut run, and you can indulge in uninterrupted zzz's.
Pop in a video to keep the kids amused, and flip through that pile of catalogs.
Arrange a playdate with a mom friend once a month -- as the kids romp, you can gab and catch up.
Take the family for a walk to the park -- once you're there, go for a run while Dad pushes the stroller or plays with the kids.
Sneak in your old Sunday paper-and-cup-of-coffee ritual after the kids are asleep (just make it decaf).