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Simply moving around throughout the day can greatly reduce your stress level. If you don't exercise regularly, begin an exercise program. This can help you better manage your emotions and may eliminate some stress in your life.  Pick an activity you enjoy, as you'll be more likely to stick to it. For example, if you enjoy long and aimless walks, try to walk a few miles a day after work. Ease into any new routine. You will have to start small, especially if you haven't exercised regularly in awhile. It's a good idea to talk to your doctor before beginning any exercise program, especially if you have a chronic heart condition. Poor sleep can worsen existing stress. Make a commitment to getting a solid block of sleep each night. You may find yourself feeling less stressed throughout the day.   Stick to a sleep schedule. This will help your body's natural circadian rhythm. You'll feel tired at bedtime and energized in the morning. Even on weekends, try to wake up and fall asleep at the same time each day. Choose a relaxing bedtime ritual that you engage in away from bright lights. For example, read a book or do a crossword puzzle. Bright lights from electronic screens can make it difficult to sleep, so put these away when you start getting ready for bed. Make sure your bedroom is sleep friendly. Block out any unwanted noise and keep the temperature between 60 and 67°F (15.6 and 19.4°C). You may have to get a fan or air conditioner. If you're very busy especially, you may not actually make time for yourself to relax. Many people see fun and relaxation as self-indulgent. For your emotional wellbeing, however, relaxing should be a priority.  You probably have more time than you think you do. Find a chore or obligation you could cut down on. For example, maybe you don't need to do the dishes immediately after dinner. Let them sit in the sink overnight, and take that time to do something you enjoy. You can read a book, watch a movie, go for a walk, or call a friend. Do anything that helps you unwind. It's important to incorporate fun and levity into your day-to-day life. If you're not eating healthy, this can affect your mood. Try to cut out things like sugar and processed food and replace them with whole wheats, lean meats, fruits, and vegetables.  Try to eat three meals a day. Never skip breakfast, as this can set the tone for a stressful day. If you're in a rush, at least grab a banana or a cup of yogurt on your way out the door. Eliminate things like tobacco, caffeine, and alcohol. These can all raise your stress level.

Summary:
Exercise. Improve your sleep. Make time to relax. Change your diet.