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Anything below 70 is a hypo. Try to keep your blood sugar between 70 & 99 out of bed, and between 100 & 120 during the day. Please note that an average blood sugar above 140 can cause you problems down the road.
Read through the first three threads in the Type 2 Section, when you get a chance, if you have not already done so. These threads will most-likely help you a lot. Self education is one of the keys to successful management of your diabetes, along with a healthy / sensible diet and exercise. Basically, diabetes requires a life-style change for the better. Good luck with your control and management.