Volunteer. It is amazing how many nice, caring people you'll meet.
Plus, you will be giving back to the community. There are so many places that need basic help. A soup kitchen. Habitat for Humanity. Goodwill. Salvation Army.
Meeting new people at these places is amazingly eye opening and very enriching.
Or, you could have children and totally change your lifestyle.
Edited to add because I didn't answer your questions:
I have an iPhone, TV, home, etc. All of that *stuff* makes me happy. I like technology. I also love being outside. I love cars. I love driving fast. I love animals. I love eating animals.
Is my life simple? No, not really. I have to drive to work. The public transportation is the wrong direction. I have to pay my bills and save for retirement. That is the nature of today's life. I would rather live farther out in the country, however, the property is more expensive.
Overall, I'm very happy with my life.