I notice that the Miss America Pageant now has every contestant adopt a cause that she's interested in promoting. Plenty of the young ladies already seemed to be involved in different causes anyway; a surprising number of ordinary people are. That's a pretty good idea for everyone, to find something you're interested in and care about, to devote some time and energy to. It doesn't have to be the most important cause in the world, just something where you know that you can help.
Having a mission adds something to your life that business and family doesn't. It enriches your life. If you devote some time to working for an animal shelter, helping at a food pantry, or serving a political cause, it's something special that you do simply because you think it needs doing. There are side benefits - you meet other people on the best of terms when you know that you both care about the same things. Sometimes those people turn out to be good friends, or helpful business contacts. Single people often find new love interests working for a cause. You can't find a better way to get to know good people.
You don't need to have pots of money or special talents to make a difference, either. Most volunteer organizations are happy to get ordinary people who can type, or drive, or make phone calls, do all the ordinary things that need to be done. What does it take to help an elderly person with housework or read a book to a child? It's not so hard! You probably have plenty of special skills that some good cause needs.
If you get the feeling sometimes that life is just work, work, work and nothing but sleep and television in between, you owe it to yourself to get out there and do something that makes a difference. I know that when I'm working for something I believe in, it makes me feel alive! And I'll tell you, when you look back and see that something you did really changed somebody's life for the better, it gives you a special pride.