Be sure to consistently follow your doctor’s instructions about medications, including insulin and other oral diabetes medications, on how to take them and when. Further, if your doctor has put you on a strict diet or you've consulted with a nutritionist or registered dietician, make a concerted effort to follow those dietary plans, which were designed precisely to avoid complications with your illness and to keep your blood sugar levels stabilized throughout the day. Sometimes the best preventive medicine is to follow the rules and guidelines set by your primary healthcare practitioner. Individuals with diabetes are recommended to monitor their blood sugar at least once daily, ideally upon waking in the morning and before eating anything. Be sure to log the number on a data sheet or journal, noting the date, time and result of the test. Some diabetics, especially those with “brittle”  diabetes, a condition marked by swings in blood sugar levels, should check their blood sugar more frequently and up to four times a day (before breakfast, lunch and dinner and before going to sleep). To monitor your blood sugar level using a glucometer (a blood sugar meter), purchase the meter, lancets to prick the finger, compatible test strips and alcohol pads to cleanse finger before pricking it. To test your blood sugar:  Wash your hands with soap and water. Take the alcohol pad and cleanse the pad of the index or middle finger. Hold the lancet against your finger at 90 degrees and release the lever to prick your finger. Squeeze a drop of blood onto test strip. Insert the test strip into the glucometer slot and await the reading. Log the measurement in your data log. A level of 70 mg/dL or lower is indicative of low blood sugar and this is usually when you will begin to experience the symptoms of hypoglycemia. You should eat three full meals and have three small snacks throughout the day so that you are eating regularly and consistently. Make sure to time the meals and snacks so that the gaps between them are evenly spaced...

TL;DR in Vietnamese:
Tuân thủ hướng dẫn của bác sĩ. Kiểm tra đường huyết đều đặn. Ăn 3 bữa chính và 3 bữa nhẹ mỗi ngày. Tuân thủ chế độ ăn cân bằng. Hạn chế tiêu thụ caffeine. Luôn mang theo món ăn nhẹ. Ăn thức ăn khi uống đồ uống chứa cồn. Tập thể dục đúng thời điểm. Điều trị cơn hạ đường huyết.