I found this on Google.
Don't go out drinking alone. Go out with your friends and watch out for one another - perhaps appoint a drinks watcher. Never leave your drinks unattended. It's safer to not accept a drink from someone you don't know.
Consider sticking to bottled drinks and avoiding punch bowls or jugs of cocktails
Don't give out your address to someone you've just met
If you think your drink has been tampered with, don't drink it - tell a trusted friend or relative immediately
Before going out, let someone know where you're going and what time you expect to be home
Make plans for your journey home, if possible at the beginning of your evening.
Avoid taking expensive equipment with you or anything that could be a target for thieves
When in bars or clubs, get your drink directly from the bartender. Keep your eyes on your order. If you set it down to go to the dance floor, be wary of going back to it.