When was the last time you took a vacation? It might be worth it to spend some time to find someone to try and hold your clients at bay while you take off for a month or even to just tell your clients that you wont be available for that period.

If you can't take the time off, you can try and travel and work at the same time. You can join a coworking space and meet people and build a community and you might gain some perspective. Developers outside the US make significantly less and you may discover a sense of gratitude that you gain from this perspective.

I've been working remotely mostly in Asia with short stints in South America and Europe for a few years now and this has worked wonders for me. I mostly work alone and I can't imagine being back home doing the same thing.

A change in environment may be all you need to engage in new healthy practices like exercising. For example, if you're near a beach in Bali, like I am, it's easy to jog along the beach during sunset. And if you're not, being surrounded by yogis might get you in some regular classes that may help with being more mindful.

Hope this helps.