Stalking.
Wearing night vision goggles while perched in a tree or something. (see #1)
Asking a girl out while speaking "Klingon." Then laughing when she doesn't understand.
Calling 1-900 numbers.
Calling a BBS and looking for girls.
Walking nonchalantly through the lingerie section of Sears 3 or 4 times, sneaking quick glances.
Dressing up as a Federation of Planets Admiral because hey, chicks dig the people with the highest rank.
Setting your Casio watch to beep when you're next to some girl and hoping she'll say, "Wow Bernard, is that that the new Casio GMT-90 with global positioning tracking and indiglo? You're cool."
Playing some "interactive sex" game on your computer.
GIFs! GIFs!