In the beginning of May, I was fortunate enough to spend 5 days in Rome and Florence with my boyfriend. Here are a few of the things I found out on my trip:
Do some of your sightseeing in the evening. You get to stand first row at the viewing points and enjoy beautiful sunsets and stunning light over famous landmarks.
Don't wait in line at the famous attractions. Walking up to e.g. the Colosseum, people will try to convince you to buy different types of tickets to skip lines and get audio guides. Just say no! We got a regular ticket for the Colosseum and walked right in. The ones who got the special VIP ticket, however, ended up waiting in line because all the tourists got those tickets.
Try aperitivo when eating out. It's delicious and sometimes comes with a bottle of wine. It was one of the most inexpensive, yet yummy, meals we had on our trip. Trastevere in Rome has many little restaurants offering this.
Remember, some of the best sights are free of charge. The Vatican, the Spanish Steps, sunsets, walking the cosy streets. Before you get the expensive VIP tourist tickets, check out first how much of a sight, you can see for free. E.g. the Vatican is free, but the museum is not. For me, seeing the Vatican was enough. And enjoying the Spanish Steps was a real treat, which brings me to point 5...
Go crazy on the gelato!!! And I mean it. A gelato a day, keeps your hunger at bay. I had probably two a day and it is just yummy!! Not cheap but soooo worth it!