There are various things you can do in Rawalpindi. A few of them are:

1) Plan a trip to Raja Bazar, Bara Bazar and Murree Road. Although the traffic gets horrible at times, but you will find such amazing stuff at amazing prices that you'll forget the pain.

2) Go to Ayub Park, have a pleasant walk around, it will give you hours of walk in green meadows without having to worry about anything else. If you take the family along, you can eat snacks and even take you own for added fun !

3) If you have more time on your hands, go to Murree. Murree is one of the hottest attractions (attraction wise, temparture wise its very cold) where you can spend even weeks if you like to, every day is a new day.