I’ve heard so many ridiculous comments about seeing “everything you need to see in 2 days”, that I was embarrassed to be American. Venice is a gem, and especially so at a slow pace. Sit in an off-the-beaten-path campo and watch, and listen, and feel the city. Every tiny church that you walk into is filled with the loveliest of treasures. The old Jewish Ghetto is wonderful. Get to know each of the districts, and go far enough away from the tourist areas to hear the sounds of the water at night. See the real Venice and fall in love.