This isn't just something developers/engineers go through many office workers suffer from this same issue when there job has fuzzy endings, e.g. Marketing, Busi

This isn't just something developers/engineers go through many office workers suffer from this same issue when there job has fuzzy endings, e.g. Marketing, Business Development etc. So you aren't alone, I think most everyone goes through some form of work based isolation essentially if they do knowledge work (or have fuzzy endings). The key is to have a few activities you do outside of work that are scheduled and you enjoy. This forces you to do two things, one cut off work, and two interact with other humans doing something non-work focused. For me, I have found coaching youth sports is a great outlet that checks a lot of the boxes, e.g. people interaction, not work related and something I enjoy myself which forces me to be active too. I also love the water, just put me on or in water (pool, ocean, boat etc) and I can nearly instantly relax and enjoy myself. Being outside is healthy, you need a "healthy" amount of sun time as our bodies use it for more than just Vitamin D, just don't cook yourself that doesn't do anyone good. I can seriously tell a difference in my mood and behavior even after just a week if I have been inside too much or we have non-stop rain where I don't get any sun. * edit a couple of words