I receive, constantly,a lot of emails, private messages on my Facebook fanpage with questions about Venice. Sometimes, they even don't introduce themselves, they just want to spare time and go straight to the point
"Hi, any events / shows / parties / festivals / tours in Venezia March 2-6? Regards,..."
I should advertise myself online for cultural escorting services, a culture hooker, a middle aged gigolo trough The stones of Venice.
First, all your questions related with Venice are about Time and how to waste the less amount of time in your touring.
Wasting your time, getting lost in an unknown venetian alley is the most intense and precious experience You can bring home from your trip to Venice.

You are visiting Venice, You have the privilege to see, live, the last surviving Polis in the world, don't run, don't try to understand everything, just stop, breathe, relax.
Then, try to focus on your interests: Architecture, Museums, Food, Wine, a thousand years old City is too big to take in one swallow.
You can like or hate this City of mine, if you don't like it at the first sight, don't try to waste your time trying to figure out more informations, more sightseeings, Venice is about travelling not tourism and it's well known that venetians do hate "tourists" so,just skip Venice on your next trip :-). If you love Venice, you'll visit many more times and it will be highly rewarding.

Best regards

P.S.
Next time we'll discuss the venetian way of saying "tirar sarde" and the local rituals ;-)