I have many pet peeves, but one of my biggest is people who don't smile (search).

Non-smilers tell me they don't smile because they have nothing to smile about. I don't buy it. We each bear our own cross in life, some a lot heavier than others. For my money, a good attitude and a good smile, go a long way.

All I know is that I like to be around smilers. And don't like to be around non-smilers.

Look, we can't always smile. But I think we should try, even if you have to fake it. That sounds horrible. But I think our very economy depends on it.

Think about it: The waitress who refuses to crack a smile, usually her service stinks. You don't like the waitress. You don't leave a good tip -- or any tip. She's ticked off. You're ticked off. What have we solved here?

The guy at the electronics store who couldn't be ruder. You lose your temper. The store loses a sale.

I've got a plan: Everyone smile. The people serving. The people served. Come on, everybody.

Studies support what I'm saying here: Smilers get better tips, smilers have more friends and -- this is right from Dr. Ruth last week on my show -- smilers make better lovers.

Smilers make even non-smilers happier. Non-smilers themselves have told me they hate being around non-smilers. Imagine that: They make themselves sick!

So try it. Smile. I'm convinced you'll feel better for it and our economy will be better off because of it.

Watch Neil Cavuto's Common Sense weekdays at 4 p.m. ET on Your World with Cavuto.