Reducing stress and improving lifestyle [diet & daily exercise] can help reduce your blood pressure.
Weight loss [if needed] and lifestyle changes particularly the Mediterranean diet, daily exercise, sleep management, stress reduction, and avoiding salt can help lower blood pressure.
Effect of longer term modest salt reduction on blood pressure: Cochrane systematic review and meta-analysis of randomised trials. 2013 Apr 3;346:f1325. http://www.ncbi.nlm.nih.gov/pubmed/23558162