Don't bother with Juliet's house museum, despite the hoards of tourists there is not much of interest in there (and uhhm, she didn't actually exist) however it is included on the ヴェローナ card, which is good value and covers most of the churches and museums.
ベニス is absolutely beautiful. The architecture is breathtaking. This is a must-see city. Go to St. Mark's, it is free to visit inside but photography is not allowed. But it is magnificent, breathtaking inside. The Piazza San Marco outside the basilica is also very nice. Just walking around is nice. Beware of water taxi drivers trying to get your fare - for a similar price you can get an all day ticket on the ferries. These guys will catch you as you enter the city and show you which way to go - to their taxi. Ignore them and get a ferry. It is worth catching a ferry and staying on it to see the city from the water. Everything else is very expensive. Beware of restaurants who display a price list out the front - they will charge heaps for drinks (even soft drinks) and for "services" and even for "complementary" food. Venice is absolutely amazing. Put it on your list.
We did not like ベニス. If you must go, stay for a day or two -- that's all you'll need. People there don't know the word politness. If you have lunch at restaurant, check your bill very good because they like to add things that you haven't ordered.
Most accomodations are not near the train station, but that's a bonus. Since ベニス is comprised of tons of little islands, if you want to stay in the heart of the city, then you would want to stay away from the train station anyway. The walk from the station to the first real bridge bringing you into Venice is great (you can't get lost, it is one winding road) but once you cross the bridge it can get confusing. Just be polite and ask a local for help (or point on a map) and you shoud have no problem. As touristy as it is, take a gondola. If you can find an open post in the middle of the day, go for it (most people try to do early morning or early evening) and because there wont be a long line, you may be able to negotiate the price. And of course, in the evening you must go to Piazza San Marco, one of the best piazzas in Italy to see the church, listen to live music, and have a good meal.
ベニス is lovely once you get over getting lost all the time. It would have been better to go with someone as getting lost by yourself is worse. I found the people really helpful. I would have gone to Venice to see the Guggenheim collection -- it moved me to tears and a definite must for modern art lovers.
ベニス is a beautiful lady. But Venice is as well robbing people's money. They charge 6 to 8 Euro an hour for internet, 9 to 12 Euro for a washing a load and drying, and up to 35 Euro for a hostel bed. Be prepared to pay more than in other expensive cities. Tip, if you crave a cappuccino, drink it standing at the cafe's counter -- costs between 1.20 and 1.40 Euro instead 2.50 Euro sitting down. Look in the side streets for cheap bars and restaurants. That way, you have a cheap stay and save money for more travels.