If you ask me, a true gentleman is someone who takes care of others. And honestly, it's as good for you as it is for them. Scientific studies have shown that spending money on others can have a better effect on our personal happiness than spending it on ourselves. But you don't even have to spend money to make a difference in the world around you. After all, the world can be tough. We're all stressed and overscheduled, but there are small ways to "be the change you want to see in the world." Here are four ways to contribute to causes you care about, help people who are less fortunate than you and generally improve the lives of those you care about.