Work fewer hours, definitely.

If you really can't, more important than doing 1h of exercises is to spread movement over your day. In this regard, Deskbound will probably help you amazon.com/Deskbound-Standing-Up-Sitting-World/dp…

This is for you to at least be functional/healthy, not ripped.

If you can squeeze a few more minutes in your day, learn to do body weight exercises. Grab a book like amazon.com/You-Are-Your-Own-Gym/dp/0345528581 (it's ok) and start doing them at home, when you can.

1. Sleep well
2. Eat Well
3. Code Well - Yeah seriously. The nature of code and it's result does impact us mentally.
4. As others said, Workout. If you can't go gym, Do Plank, it's pretty effective exercise and does not require much space.
5. Avoid Social or formal media as much as you can to stay focus.

I would suggest something that I myself do - play a team sport. In my case, that's hockey (field). I've done this since I was 7, having played a few years of top-class sport in my youth.

It's good for your body and mind as you do a whole lot of cardio and attending the third-half after with your teammates :)

1. Work fewer hours. Overworking yourself can be just as bad on your body as not exercising.
2. Whenever I play video games or watch TV I hop on my exercise bike.
3. Use a standing desk ( standing vs sitting uses ~ 50 calories per hour ).
4. Use your lunch break to get outside and exercise if possible. If not then at least do jumping jacks and situps indoors.
5. Count calories when you're eating.

I find that using public transport (walking to train stations, bus stops, etc) instead of driving, doing all my own cleaning/laundry/cooking and doing 10 pull-ups whenever I walk under my pullup bar (which is in my bedroom door frame) is enough to keep me fit, but when I have the time I make sure to swim laps and go for a stroll as well. I rarely attend the gym, but if I have to work out, I do it at a place called BodyTec - they attach electrodes to my skin that makes my muscles rapidly expand and contract while I work out, intensifying my routine. Typically a 20 minute session provides the same benefit as a week's worth of gyming. I was skeptical at first but the results have been pretty consistent.

"F**K stress and bench press".

Yes, there is no alternative to physical training. I work 14 hours a day, still manage to lift for 45 minutes. Sometimes even in mid-night. What if a gym is closed in late night? High intensity running at beach side.

To all devs, please have one one physical activity no matter how many hours you are putting in work, it's all about balance :)

https://www.youtube.com/watch?v=uiKg6JfS658 comes to mind :)