Something that I’ve been doing since I came back to the US is writing out a list of novelties for myself each week. I call them my Weeklies, and on this list—I make mine on Wednesdays—I write down a recipe, a song, a place, a movie, and a non-standard task. By the following Wednesday, I aim to have cooked that recipe, learned to play that song, visited that location, watched that movie, and completed that task.
… It’s a framework for newness. And it can take a little while to get used to, but if you find yourself in a rut or a repetitive spiral, you might consider making your own list, with your own you-shaped goals, to see if it helps you diversify your growth, as well.