Don McAllister runs a popular Mac training site, Screencasts Online. It's his full time job doing the thing he loves - teaching people how to use their Mac, iPhone and iPad.
He's able to do this by charging a membership fee for most of the videos he publishes and then offers a free video once a month to demonstrate what the rest of the content looks like if you become a member.
As a special offer for listeners and readers of SSKTN - you can redeem the following promo code for a free copy of SCOtutor for Mac (iPad app). The promo code is available on a first come, first serve basis.