Some ideas:
Take a stroll down Robson Street.
Vancouver Shopping on Robson Street
Check out Stanley Park.
Awesome Japanese (sushi), Korean, Chinese, or seafood restaurants.
Try a Japa Dog. These things were all the rage during the Olympics. (Also, not too far from Robson street area.)
Japa Dog - Downtown - Vancouver, BC
Some other tourist stops: Granville Island, Capilano Suspension Bridge