Kitschy, yes. Useful, absolutely. It's more about theory and mindset than practice. For years I've offered this math to determine when to outsource my tasks.
IF my hourly income (how long it takes me) - tax > outsource cost THEN outsource
Simple really. Yet, so many people I know spend their $100/hour time to work on $50/hour problems. If you love working on your lawn, by all means do so. But, that's a luxury item, not a chore and not profitable unless your local lawn care expert charges more per hour than you do. And, at the time allowance you require. If I work on my car, I'll spend four times the hours my mechanic will.
Ferriss points on a host of ideas for upgrading your life here, but primarily it's about valuing time and skill, trending toward peace and focus in ones life. A worthy read even if the title sounds silly and is wholly impractical for the super achiever.