One of the best place in the world. It is not because it is told and written by travel guides but because I was living near this place for more than a year.
The best time for Indian people visiting this place is summer as in winter it is very cold to go on Gondolas and boats.
To stay in hotels along the grand canals are very costly may be around 250 Euros per night hence the best place to stay is Holiday Inn hotel sitauated at Mestre(10 kms from Venice).The rates are from 90-130 Euros/per night. Though whole of Italy is very costly w.r.t hotels but here they are costliest.Hence plan your visit months in advance.Other cheap and hassle free option is package tours by Thomas cook, Raj Travels etc. which looks after every thing.
For vegetarians one can find vegetarian sandwitches with cheese and other vegetables.One can also visit the stores like PAM situated across Venice railway stations along grand canal.Here one can get all food products much cheaper than sold in reasturants.
Things one can buy is Murano glass where it is available from 10 Euros to thousand euros.One day 24 hrs boat drive cost 10.5 Euros in which one can travel unlimited times to any place.Places worth visits are Saint Marco, Riyaldo, Murano, Lido etc.