Get a treadmill, rent an exercise video for some indoor exercise? Works for me!
Also, since I eat dinner pretty early (5pm), I get the munchies around 7-9pm, so generally, I'll snack on various low cal foods which include:
1. raw cucumbers (peeled)
2. serving of fresh fruit
3. a 12 oz can of diet cherry pepsi (once in a blue moon)
4. hot tea w/lots of fresh lemon and splenda
5. **IF I'M FEROCIOUSLY HUNGRY AND NEED SOMETHING MORE - I'LL HEAT UP A 3 OZ PIECE OF GRILLED CHICKEN AND EAT THAT*** THE HIGH PROTEIN/LOW FAT USUALLY CALMS ANY SERIOUS LATE NIGHT HUNGER!