Removing wireless networks from your preferred list!
Like I posted on my Facebook page, I was stuck on dial-up for a week and the way I handled it is I retrieved my old airport extreme and set up dial-up on a second network. Since then, every time I restart my Mac, it automatically logs on to the Dial-Up network which of course has no internet access right now. The best thing to do in that case is to remove that network from your preferred list of networks. That can be done in the airport section of System Preferences. From there, you click on Advanced. A list of preferred networks will then be displayed in the Airport tab.