i believe the phrase is, dont turn it down, turn it round.
1. take your car, then u got an excuse not to get drunk and sleep with her anyway.
2. have your mates number so u only have to press green twice and then u can put the phone down, then when your mate rings u back u can make up some excuse and leave (especially if shes a minger)
3. email never shows your true colours, its easy to be whoever u want to be when its not face to face.
4. if everything is going well then u already have something in common and therefore wont run out of things to say to each other and u already have some kind of basis to go on.
5. good luck and keep us updated