The Roma Pass
One of the best deals in Rome is the "Roma Pass." It is a 20 Euro investment but well worth it if you plan to be in Rome at least 3 days. It covers admission to two museum/sights and unlimited metro/bus transportation for 3 days. We used ours on the Coliseum (11 Euro) and the Borghese Gallery (13 Euro). Then, with the number of times we used the metro and bus, we saved at least 10 Euro by getting the card. We bought our Roma Pass at the Palatine Hill ticket booth, but they are sold in Tobacco shops and other various locations as well.
Some of the fountains are there for people to drink from (you'll either see a sign telling you the water is drinkable and/or people refilling their water bottles). No need to buy a new water bottle every few hours, just re-fill it at one of the fountains. Most of them are a spout coming out of a wall. You can also use these to wash your hands or splash your face with water if the weather is extremely hot.
Fontain del Mascherone has a twin in Spoletto
Walking on Via Giulia toward the Tiber from Rome center just after we pass under the extraordinary vine covered bridge (another off the beaten path tip) built by the family Farnese, we find the Fontana del Mascherone (the Big Mask - do we wonder why it is so named?). Everyone agrees that this is one of the more bizaare monuments of Rome - and it does have a twin (not an identical twin - but a twin no less) in Spoletto (photo 2).
Another of the Farnese family gifts to Rome, no one seems to know who sculpted it - or at least no one in history cared to own up to the questionable artistry. It is said that the Farnese's had wine flowing from the fountain during their more notable soirees.
If you need a taxi from Stazione Termini, go to the official taxistand. The queues are long but go very quickly. Taxis are not very expensive and, as far as we have experienced, take you to from A to B in the shortest of time. Unlike taxis in Amsterdam, where they think you do not know the way in your own hometown...
My favorite gelato...ever!
I've had gelato all over America, including Boston's Little Italy, and then in several different cities in Italy. This is my favorite! Best flavor, best selection (over 100 flavors), and best texture. I heard this reviewed as a bit of a tourist trap, but I honestly thought it was better than some of the much smaller operations around the country. Their "Mousse" variety, whipped gelato, was my favorite. You could always get a four-scoop and try four different varieties. ;)