Keep an eye out at Havelska Market — you're bound to uncover a great travel trinket in one of its many stalls. After you've admired the wares, grab something to eat from one of the nearby food vendors.
This Prague City Center community marketplace is an interesting spot to kick off your day of sightseeing. There's lots to experience nearby, like Charles Bridge, Old Town Square, and Prague Castle. Wander around at your leisure at Havelska Market before hitting up these other fine sights.