* Eat a healthy, balanced diet, rich in fruits and vegetables and low in fat. * Start a regular exercise routine. You should get at least 30 minutes of exercise on most days of the week. * Stick to a regular sleep schedule, to make sure you get plenty of rest every night. * Take a daily multivitamin that includes 400 milligramns of folic acid. * See your doctor for a physical exam, and make sure you're up-to-date on all vaccinations. * Also talk to your doctor about whether any of your current medications may not be safe during pregnancy. * Don't use illicit drugs, cigarettes or alcohol.