Use Google

This is basic Psycho Stalker 101 stuff here.

If you're in love with someone, you need to Google them. Repeatedly, in case anything changes. Do it at least once per day.

You should Google their name, their nickname, their email address, and anything other relevant information. This is an excellent way to keep tabs on someone.

And you never know what you might find! They might have book reviews on Amazon. There could be a profile on Myspace or Facebook. There's even the possibility of finding a photo of an ex on their Flickr account. Plus, just in case there's any dirt out there, like a listing on DontDateHimGirl.com, it might turn up on a Google search.

This should provide you plenty of information to casually mention during conversation to keep your victim -- er, I mean lover -- on their toes, and impressed with how smart and resourceful you are!