Should I have bought bell-bottoms?

Between rice rationing (purchasing restrictions at one store, really) in California and news of gasoline lines (and more widespread purchasing restrictions) in Britain, plus a flagging economy, well, makes everything seem very 1970s.

Should I swap my computer for a CB radio?  (Solar powered, of course.)

So a question for the assembled wisdom. What 1970s musical standard -- any genre -- should we impart upon the generation who doesn't remember it the first time?