Bill Clinton built his self serving library and dedicate himself to advancing his wife's political career. George W. Bush basically laid low. Something he does to this day. George H.W. Bush did about the same. Reagan was in declining health so did very little. Carter promptly began trolling for a Nobel Peace Prize in order to validate his horrible presidency. What is Obama likeliest to do given his relatively young age (55) and apparently good health? One can assume he'll build his presidential library and museum in Chicago. Probably the first presidential library where the bullet proof glass actually proves useful and the tourists get a free Kevlar vest. I assume he'll be playing celebrity golf a lot.