What should I do for high fasting glucose with normal random glucose?

Diet/exercise. It's not normal to have a high fasting blood sugar. By definition, it means you have pre-diabetes. This is an important time to look at your lifestyle choices because you can bring it back to normal with the right diet/exercise routine. If you are overweight, work on losing some weight. Watch portion size and try at least 30 min of moderate exercise 5 days/week.