In my vocabulary, Bruges means beer!
Start with a morning brewery tour, there are two within walking distance of the centre with free tastings! Then, head for lunch at one of the swanky restaurants by the fish market (go on splash out - you only live once) where you get a different beer with each course and even your own beer waiter!
Then head for one of the taverns near the Cathedral to try a Kwak or two, just for the glass it comes in (think chemical warfare and you'll get the idea). Then if you dare, try climbing the Belfort Bell tower for comic effect or sober up with a walk around the city walls or by sampling a chocolate or waffle or a chocolate waffle!
Finally, end the day sipping your favourite beer while eating mussels and watching the world go by at one of the many restaurants in the Markt Square. Perfect!