The first thing you need to do is find out what causes high blood pressure. Next, you must determine the cause and take steps to decrease it. This could be as simple as eating less salt, losing weight, taking medications, etc.
Make sure you're getting enough exercise. If you don’t have enough time to exercise regularly, consider walking more often.
If you're not happy with how much exercise you're doing, then you should consider joining a gym. You will probably join a gym where you can meet other people with similar goals. It's much easier to follow a routine if someone is with you at the gym.