Try it, you will certainly brighten someone's day, and make yourself happier, as well.
The world would be a much better place if everyone followed the counsel of Jesus Christ, having love for their fellow, caring more about everyone. If people just stopped power trips, greed, ego, and loving money above just about everything else.
People who are caring and give of themselves are happier people. They get a better feeling about themselves, and are much happier.
Those who are so self absorbed, and edgy, self-centered, are usually rather lonely as well.
Don't you just love it when you can give something to someone who cannot return the favor? Doesn't it warm your heart to do something to help others, whether it is to help an older person who may have failing eye-sight to read a label on a box in the grocery store, or a price tag on the shelf, or maybe even buying a Subway sandwich for someone who is obviously very hungry, but doesn't have the money to buy it for their self?
Volunteering as a local animal shelter, or pet rescue, helping at the local hospital, or taking a neighbor shopping are all things you can do to help others, and get your mind off of yourself so much.
I know it always makes me happy to give something of myself. Maybe you got two slow cookers or toasters as gifts, and can only use one.
Take the extra (s) to someone who doesn't even know you are bringing it, and don't even let them know from where it came. I actually did just that once.
I quietly drove up their street, parked so I wouldn't be easily seen, and just put it next to their gate and left.
I knew they could use it, and that they did not have the where-with-all to buy one, and it made me happy just thinking about the meals that would be possible, as well as making it much easier for them to prepare. It also lets them know that someone cares about them, and that also helps them to feel better just to know someone understands and cares about them.
If you've never done something like that, try it sometime. I guarantee you will be a lot happier for it.