I usually go with whatever my current situation is - could revolve around the weather, sports, news, etc... That leads to cool names and often boring names...but I've had so many teams I had to go with something!
eg. - Rainy Daze (it was raining out when I filled my draft card, and I changed the spelling of "Days" to make it seem cool)
Hampton Spaniels (we'd just come home with a new Springer Spaniel that weekend).
Well, you get the idea. FWIW, Aerodave's names have very cool themes and outputs...I'm gonna have to up my game now!