Something I also suffer from. I've just read an article on apple cider vinegar, which is meant to help with all sorts of things (including weight loss). Am going to try it, and see how things go - I'll let you know, if you wish!
Losing the weight will be the best way. I had high bp and was on meds for about ten years. After losing about six stone my the doc took me off all meds!!! My bp is perfect since then. Foods to avoid include all high fat and high salt foods. Do not add salt at all to food as there is plenty added in much if what we eat. Moderate exercise is best to improve health of artery wallso etc. something simple like a 30 min walk every day is brill for it. Lots of luck