Fred Wilson of Union Square Ventures just wrote a very informative and articulate post on how he made it as a VC. Here's what Fred thinks you should do (as opposed to what he did):
The way you do that is you work for at least ten years in the industry, getting operating experience, building a killer rolodex, and learning how the business works from the inside. Then in your mid to late 30s, you can make the move to the venture capital business, as a partner, not as a wet behind the ears associate who doesn't know anything other than how to push numbers around a spreadsheet.A number of VC firms do, in fact, hire precisely based on this profile. If you're not prepared to take such a circuitous path, here's a post I wrote a while back on finding a job in venture capital.