[cnn-photo-caption image= http://i.cdn.turner.com/cnn/2008/images/06/27/art.bill.gates.gi.jpg caption=] FROM CNN's Jack Cafferty: Bill Gates is walking off into the sunset… well, kind of. Today marks his last day as a full-time worker at Microsoft, the software giant he co-founded more than 30 years ago. At 52, Gates isn't totally retiring. He'll still put in one day a week at … Continue reading How would you retire if you were Bill Gates?