Reciprocity makes… Wait, scratch that. Just being a decent person makes this world a better place. Still, reciprocity is huge and can go a long way towards improving relationships.
Great examples of reciprocity: following back someone that follows you, returning a favor, or paying someone back when they didn’t expect it. Let’s be more awesome and take it one step further. Don’t just wait for someone to do something for you before you do something for them. Do something for them without asking for anything or expecting anything (The Go-Giver).