I have, but I was already doing quite a few things Ferriss suggests long before I ever read it :). I'm getting a LOT better at delegating to outsourcers, though -- taking steps on almost a daily basis to be left with only creating original content and that's it. Posting, management, proposals, bookkeeping, marketing, etc. etc. is slowly being handed out to others. I'd never want to get down to a four-hour work week, but I am down to a four-hour work day and wouldn't mind making it half that and only if I want to work ;).