Go to a bar or other public venue. Pick up chicks. Or guys. Whatever gets you going. Rinse, repeat.
Different for different people I guess.
If you're chasing guys/girls, you're really just working towards a common goal with pretty much the same desired outcome (whether it be coffee, dinner, sex, whatever). One party is rarely giving something up in order to make the other person want to come to an agreement. That usually comes later in the relationship ;-)
negotiation |nəˌgō sh ēˈā sh ən|
noun (also negotiations)
discussion aimed at reaching an agreement
There is very little difference in negotiating a salary and negotiating a romantic relationship at the end of the day. You try to reach an amicable agreement that both parties can live with. The reason I recommended a bar/public venue is that you can get way more practice there than waiting for your next salary offer.