So my take is that once you start feeling that, you should find a manual hobby, something that you produce with your hands, by your effort, even if simple things. In my case, I sew. Since I do manual work, crafting solutions for mundane things, I see the results of what I’m doing, I have a direct contact between doing something and achieving something — again, even if just a mundane thing.
This takes me out of my abstract world, where I tend to get lost, and from measuring myself by the standards of others in tasks that are not quantifiable in terms of real competence. By doing manual work, I take a much needed break from the my intelectual work and demands. For a bit I feel more like a normal person, competent enough to do this particular manual job.