For engineers and everyone working a lot in a front of PC it is very important to have any sport activities in everyday's schedule.
I am always walking a lot, every day going for lunch in any cafe or restaurant which is not near to office. Don't use car or public transport. If there is a park somewhere between, always walk through the park or just take some rest there before/after lunch. Sometimes I have even meetings in the parks or any beatiful and quiet area.
Always practice mindfulness, train your mind and control your emotions. This is especially important for managers and CEO.
I have found Tai Chi and Qi gong very very helpful for both of them - body and mind. There is even more in Buddhism - a book of life, a philosophy of self-imporvement and stress-control.
Take small breaks more often.
Keep learning something new.
Read books, answers, watch videos about the successful people.
Just be opened, social, humane and try to understand every person from their perspective, never judge people, never make any conclusions too fast, take more time to analize and understand first, don't expect anything from others, be yourself, you are not obliged to do anything for anyone, just focus on yourself, surround yourself with people you like. If there are any sources of stress for you, you should remove them asap.
Edit:
Forgot about the music. This is one of my recent favorites - https://www.youtube.com/watch?v=ghHDclZKVoY