It’s intimidating to plan for something that will happen four decades from now. Actually, it's the most optimistic thing I've ever heard, because it means I believe I won't get hit by a bus and die tomorrow. Hope! So touching. 

So, what are the average 401(k) contributions? Am I doing it right? Am I way behind the average 25-year-old? What's the "K" even for? Ahead, we discover (some) of the answers.