Don't Start a Blog, Start a Cult - Mr. Money Mustache

Pete Adeney, more commonly known as Mr. Money Mustache, retired at 30 after working as a software engineer for about ten years - https://twitter.com/mrmoneymustache

He blogs at http://MrMoneyMustache.com about how he saved money, where he invested it, and how he achieved "financial freedom through badassity".

You can apply to the W18 batch of YC here - http://ycombinator.com/apply

YC's podcast is hosted by Craig Cannon - http://twitter.com/craigcannon