We recently celebrated Mandela’s birthday by spending 67 minutes of our time giving back. Can you remember how good you felt? Now imagine how blow-your-mind-amazing you’ll feel if you made helping people, animals, the planet your hobby. Sure, it’s easy to toss 5 bucks to the guy watching your car and think that’s charity, but giving back isn’t about giving away cash and stuff. Why? Because your time and effort are the greatest gifts you can give.