I’m still too young to apply for management consulting jobs but want to get a head start. What types of jobs teach you the skills that will be helpful in consulting?

Anything business-oriented where you can show the following things: ability to manage people and teams; capacity to learn sophisticated concepts; ability to drive measurable impact in your team/group/division. The firm's brand-equity is important (eg, Goldman Sachs is more valued than Wachovia).