Very helpful. I like how much it emphasizes you shouldn't feel forced to include people because they're family or you were in their wedding. I'd like to have my best guy friend in my party, but I'm still debating on that.
Founder of Toms was so moved when he saw so many kids in third world countries without shoes. He then decided to start up Toms Shoes and every pair of shoes sold means one less child not wearing shoes in these countries.