Originally Posted by
stormy
With 7 days you can do Rome and Florence, although maybe a bit rushed. I would add destinations with more time, like Paris or London if you add a second week. Then you'll have four or five days per city, which gives you enough time to see the main attractions.
I always like to do as much as i can on vacation, and I usually get home more tired than when I left. You'll have to think about how hectic you want your time there to be when deciding which and how many places to go to.
If you plan on using hostels make sure you research before hand. Some will require a reservation, others will just take people first come first serve, in which case you need to be there early to guarantee a spot. I got stuck having to use an expensive hotel one night.