Whatever you do, don't go having a smoke right before you go for the medical, it can easily raise your BP by 10 points for 30 minutes or so.
I used to have quite a stressful job and at one point mine reached 180/120 at which point the doc said 'go home, and stay there!'. Since then I've got a better job, cut down on the alcohol & caffeine, and now swim about 300 lengths a week. I still smoke (for now). BP at last medical was 135/90. You don't have to go for a crazy health kick, just make a little effort on all fronts and it soon goes down.