Theres a lot to name.

Personally, the one that works best for me is just a simple Rock Paper Scissors.
The only flaw with that is its not a 100%.

Mentally, our brains convert information, and then read it back from the last thing we heard, and then process it is, so the trick is. Walk up to a nice lookin girlie, put out your fist as if you were ready to start rock paper scissors, and when she looks at you sort of puzzled. just say "Rock paper scissors, i NEVER lose."
Women love a challenge, also, make sure you go best 2/3 they'll usually instinctively go scissors (because its hte last thing htey heard) so go rock. and then for the second round theyll usually do paper, or scissors again. so just throw out a scissors for a tie or a win. Then go from there, I know it sounds sort of stupid, and complicated, but its never failed to at least open a conversation for me.

I like styles 5 questions wrong game, i've never found someone who can win that.

Mysterys stop-watch trick is good, but you need to do a few things for that.

Aswell as his pulse-stop trick, but agian you need a prop.

I'm looking for the best one. I would love to hear anyones approach routine, or little game they play.

Cheers boys.

I love the 5 question game, it never failed me.

I can imagine not always winning with the rock paper scissors, but claiming you never lose and having the girl win makes her feel good about herself too. So in that case it'd be a win-win situation wether you win or lose.