Start in the historic centre
The cathedral of Santa Maria del Fiore and Brunelleschi’s dome deserve a first visit, even if you do not go inside. Walk around the complex and notice how it changes from the surrounding streets. Climbing the dome may appeal to anyone who enjoys a view and is comfortable with stairs; for others, admiring it from below will be more enjoyable.
From there, a walk leads to the Piazza della Signoria and then to the Arno. Crossing the Ponte Vecchio is part of the classic route, though it is usually hard to find it empty. If you want a quieter look, it is more rewarding to view it from another bridge than to stop halfway across.
Choose the museum that really interests you
The Uffizi Gallery and the Accademia Gallery hold works that justify their reputation. That does not mean you need to visit both on the same day. The Uffizi calls for time and attention; the Accademia may fit better into a shorter plan. Choosing according to your interests, and checking entry conditions before you go, keeps the visit from becoming a rushed obligation.
If it rains or gets too hot to walk, the museums offer a good alternative. You could also use that time to step inside a church or explore another indoor space, bearing in mind that access and conditions may vary.
Cross over to Oltrarno
On the other side of the river, Oltrarno offers a change of pace. The area around Palazzo Pitti and the Boboli Gardens offers a different experience from the monumental centre: more room to wander, although the gardens may be less appealing in bad weather or after many hours on your feet.
It is worth leaving part of your visit unplanned: wander through streets and squares, sit down for a meal or simply rest. Workshops and shops are part of a neighbourhood where people live and work; approach them with interest, without treating every doorway as an attraction open to visitors.
See the city from above, without rushing
Piazzale Michelangelo is a well-known place to look out over Florence. If you would like to extend the walk, consider the area around San Miniato al Monte. The climb takes energy, especially after a day of sightseeing, so it works best as a plan you have chosen rather than one last task on a list.
Some worthwhile plans cost little or nothing: walking beside the Arno, returning to a square at a different hour, finding a new view of the dome or pausing to watch everyday life. For anyone who lives nearby, an afternoon like this can be a way to rediscover the city without repeating the full circuit of monuments.
Shape the plan around your trip
With children, alternating a short cultural visit with walks and breaks often works better than moving from one museum room to the next. A couple can enjoy an afternoon between the river and Oltrarno without scheduling every moment. If you have more days, you could consider a trip to Fiesole for a change from the city streets to the hills, after checking how to make the journey.
The evening needs no ambitious programme: a leisurely dinner and a walk along streets you explored by day may be enough. In any case, the centre draws many people. Making room for residents, respecting their rest and stepping aside when you need to stop are small gestures that improve the experience for everyone.
Florence rewards curiosity, but also the willingness to leave things out. Choose one work you want to see up close, one neighbourhood to walk through and one moment to do nothing. The city will give you more than a list hurriedly crossed off.