Test your sugar regularly, and track the results. Keeping a log book of your sugar levels will help you and your doctor decide if your medication and diet plan are working to control your sugar. You can save money by sharing a glucometer with a family member or friend, so long as you do not share lancets.
Quit smoking. Try again if you've tried before. Nicotine constricts your blood vessels. Diabetes already have a problem with circulation to the extremeties; that's what leads to vision problems and the need for amputations. Smoking increases these risks, as well as being bad for your health overall. Ask your doctor for some resources to help you quit.