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Walk every day
If you are on the relation home-car-office-car-home every day, it is very easy to get chronical brain stress. So make a rule for yourself to find some time for a walk every day. Even if you have little time, you can do it while your break at work, or you can walk after work somewhere in a park near your place. Your brain needs fresh air and relaxation for staying smart and calm, so walking is the best way.
Park your car farther than usually and walk the rest of the way
Instead of being in a hurry, look around you while walking. Have a look at the people around, the sounds, smells, etc. This way, not only will it be a little training for your body, but a meditation, too. It can help you with short-time stress and if you do it regularly, it will work for long-time stress, too.
Do you spend more time driving and ask yourself how to reduce stress? Traffic can be very stressful and if you get in it regularly, you can be stressed for all the time because of it. So, just take a less-traveled route, even if it's longer.