The main way in and out of town is Trans-Canada Highway 17.
You can take a walk along the Emerald Necklace trail system, or drive around Town easily. Maps are available at Town Hall, 1111 Victoria St.
There are a couple of fast food joints, like McDonalds and Subway. A small local diner named Danny's, good reviews. Also a few pizza joints, Pizza Pizza (everywhere you go in Ontario), Petawawa Pizzeria and a 2 for 1 Pizza joint as well. Kelseys has a restaurant near the Quality Inn.
Wireless Internet hotspots are available at the McDonalds and Petawawa Pizzeria, both on the main strip in Petawawa.