flynn23 writes: My father is 56 and newly "retired" after working for a Big 3 for over 35 years. He's still young and able and wanting to stay working and productive. He was a crack programmer while pursuing a CS degree in the mid-80s, and has good experience writing assembly language for IBM 36/360 systems as well as good CS principals (documentation, maintainable code, etc). What should he do to get back in the game? Buy a bunch of Ruby on Rails books and write the next Twitter mashup? Or should he stick with low level waterfall type stuff because it seems familiar? Many thanks for the community's thoughts and suggestions.