Think about going with another couple or group on the first few dates with a new person.
Before leaving on a date, know the exact plans for the evening and make sure a parent or friend knows these plans and what time to expect you home. Let your date know that you are expected to call or tell that person when you get in.
Don't go by yourself to an isolated or deserted location.
Keep money with you for a phone and taxi so that you can leave anyplace where you feel unsafe.
Be aware of your decreased ability to react under the influence of alcohol or drugs.
If you leave a party with someone you do not know well, make sure you tell another person you are leaving who you're going with. Ask a friend to call and make sure you arrived home safely.
Trust your instincts. If a situation makes you uncomfortable, try to be calm and think of a way to remove yourself from the situation.