Have a decent sense of who he is before agreeing to meet him: At the very least, make sure you have his full name and what he does for a living.
Watch out for anything he says or does that makes you think twice—i.e.
Consider signing on a girlfriend to assist you in the safety department.
First and foremost: Let her know whenever you're going on the date and where you're going.
If you sense danger, keep your wits about you and find a way to safely exit as quickly as possible.