Well, I started with one site (AmusementPics), then I realized i wanted to share my postcard collections (Postcards.AmusementPics.com), then I started putting stuff together on the parks history (GAHistory.AmusementPics.com), then teamed up with Harry to create GreatAdventureHistory.com. I then realized I wanted a place to show some of my other photos (JerseyJourneys.com), and realized since I read every news story that comes out about parks and post them on forums anyway, I might as well create a site that puts all that together (and more) so I created ParkNews.net. Then the other day I was thinking I needed a central location as an umbrella for ALL my sites and sites that I'm associated with or friends run, so I added the domain ParksandCoasters.net, which will be a giant links site for all my sites, and highlight my sites as well as my favorites on the web.
Right now a couple of those are works in progress since I have to work so many hours to pay for my car, my house, food, etc...but eventually they will all reach their full potential.