Breakfast at Fabio's place was very classy with relaxing music in the background and nicely served food. The location is great, just a few minutes walking from the center. Near the house, there is also a choice of two restos (both are very good). Not to mention all this art collection in the house, which straight brings you into the Florentine atmosphere.
And for the tip, take a guided tour to the uffizi gallery. You will not regret it !