Another great story, this one from NPR, of a former inmate, Cross Marte, who used his time in prison to not only improve his health, but also his professional opportunities (click here for full article). I know many guys in prison who used their time to earn a personal trainer certification and learn about how to start a training business. It is probably one of the more accessible programs and relatively inexpensive. I think you only pay for the test, which amounts to about $25. FCI Elkton also offered a certification in entrepreneurship from Kent State University. I participated in that program and learned a great deal about starting and managing businesses. I also taugh public speaking and small-business marketing to the inmates through the Adult Continuing Education program. It was great to see these men work toward a goal and to play a small role in helping them improve their chances for success on the outside. I strongly recommend participating in these programs during your prison time.