You hav to see what cause the HBP. If due to old age ( blood vessel harden), there is nothing you can do but take med to control and reduce caffeine drinks.

If due to lifestyle... Then you have the answer already. Cut alcohol, take note of your diet in terms of salt, sugar and fats intake. Cut caffeine drinks even it's O. If got uric acid have to cut down red meat and substitute with white meat or find high protein vegetable or beans. Control abit on calories intake.

Besides diet, Can start with light exercise like walking instead jogging or cardio. Coz when you hav high blood pressure and do heavy/ fast pace exercise or cardio, that's when suddenly a person faint or worst sudden critical / death due to blood vessel burst or heart attack.

In the end, know your limit and observe moderation