Throwing something back is definitely the best way to make life meaningful. Serving others just might be the quickest way to cure anything that ails us. Not to mention make us happier at the same time.
One of the best things about the church community is the endless opportunities I have to practice serving. Besides that, some of the best examples I know of consummate volunteering are fellow ward members.
"In about the same degree as you are helpful, you will be happy. - Karl Reiland