You do need to make sure your doctor is aware of your goal to get off the medications- but it's a good goal! Eat well and get exercise- those are the best things you can do. Here's some food tips that might help-
http://www.medhelp.org/heart-disease/articles/Best-Foods-for-Blood-Pressure/2518
Hi there. Be careful as its not recommended to stop medication without proper prior medical evaluation and discussion with your doctor. They have all your medical records and are best placed to advise you.