I am a 20 yr old girl. i have a family history of diabetes, obesity, high b.p.what care should i take so that i don't have 2 suffer from these?

Take proper care: Eat sensibly and healthy, exercise regularly. See your family physician for a check up and blood work at least once yearly. Discuss with your physician.

Lifestyle changes: Exercise 30 minutes a day 5 days a week, minimize sugared beverages to 8 ounces daily or less, minimize fast food, eat out less (only 1-2 times a week). Avoid junk foods. Limit desserts to once a week. A low salt diet with 8-11 servings of fruits and vegetables a day helps lower blood pressure. See here for more:http://www.Mayoclinic.Com/health/diabetes-prevention/da00127.