What do you do when travel starts to feel repetitive? How do you keep each destination exciting when the same options are available? [closed]

Change off between bigger and smaller towns, visit villages, do a few days of walking or join a sailing tour or cruise, use trains or buses if you otherwise would travel by car or plane.

In each city/town look for those things that are unique for that place, do your homework before arriving so you know what to look for.
Also read up on the next few locations before you do what is a small experience in one city where there is a better/bigger experience of the same kind in the next stop.

And take a break from traveling to have a holiday if you go on for a longer time. Holiday being what you would do for your yearly break from work, or just a few days chilling out on a beach, or going skiing if traveling in winter.