Currently 24, living off less than my salary and putting away everything my wife makes. Undergrad and grad school were compeltely paid for, so when I was in grad school we lived off my stipend and again saved my wifes income. About to put 20% down on a house, but will still have a fair amount in savings and investments. Will start contributing to 401K when eligible with my new job.
Ditto the comment about living modestly. Several of my friends decided to purchase a new car upon graduating, and are now floored that we can afford a house so young. Pick your priorities, live as inexpensively as possible (not cheap mind you, enjoy life), and put away what you can.
[This message has been edited by mneisch (edited 7/2/2012 4:14p).]