A few suggestions: 1) turn off the AirPort card, or leave it off if its already in that state. 2) bring up your Network Preferences and in the AirPort connection screen you can clear your list of preferred networks. 3) open Keychain Access, delete the WEP/WPA passphrases stored by the name of the network. 4) restart computer, turn AirPort back on, manually connect. And about resetting the router, you will actually want to power cycle (as in turn off, disconnect from power) both the router and the DSL/cable modem that's connected to it for about 2-5 minutes and then reactivating the modem first then afterward the router. Resetting the router with a paper clip is almost always a last resort unless you know how to set it up again if all the settings are cleared.
