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.
Make a plan for everything you do to battle your Diabetes. Plan out your exercise routine for the week, and vary it to keep it interesting. Make meal plans so you know what you'll be eating on any given day, what you need to pick up at the grocery store, and what should be defrosted the night before. This will keep you on track and organized.
You can find the most common Diabetic supplies and medications available at some grocery stores for a significant discount. This can help you keep your medical bills in check, leading you to be more likely to take your medications as instructed. Feel free to reuse your syringes a few times, that will also save you money.