4. Reduce intake of caffeine: In case you constantly need stimulants like tea or coffee to get you through the day, you definitely need to check your health. Moreover, caffeine can cause short-term spike on your blood pressure. Read here to know how many cups of tea or coffee you should have in a day in order to keep your blood pressure under control.
Caffeine can raise blood pressure by tightening blood vessels and magnifying the effects of stress, says James Lane, PhD, a Duke University researcher who studies caffeine and cardiovascular health. "When you're under stress, your heart starts pumping a lot more blood, boosting blood pressure," he says. "And caffeine exaggerates that effect." (Not sure whether you need to cut back? Here are 6 physical symptoms that mean you're drinking too much coffee.)

4. Cut down on processed food. Just about all processed foods contain huge amounts of fructose, particularly fruit drinks or any fruit-flavored products. Fructose is hidden all over the supermarket, even in the most unlikely places: processed meats, breads, pasta sauces and dressings. Fast food chains love fructose. The only thing they love more is vegetable oil.
I use a wrist cuff to measure my BP. I am consistently ( I mean every time) able to lower my BP by approximately twenty points, both values, from the initial reading. I do it with controlled breathing. I inhale deeply and hold it until it just begins to become uncomfortable, exhale slowly, and hold the exhale, until it becomes slightly uncomfortable, and then inhale slowly again, and hold it, repeating the process at least 3 times. Not only is the BP down, but the sensation is that of being physiologically calmer.
Sleep. Short and poor-quality sleep are both associated with raised blood pressure (40). On the other side of the spectrum, excessively long sleep may also be harmful. One study found increased blood pressure in those who got fewer than five hours of sleep per night and in those who averaged more than nine hours of sleep per night, when compared with people who slept around seven hours (41). I suspect that it’s not the long sleep itself that is the problem, but that some underlying condition is both increasing sleep requirement and raising blood pressure.