If you have a digital camera and you like photography then you can make some extra money very easily. You just need to be little creative with your photography skills, give final touches in photoshop and upload them to one of the website where you can show them to people and if someone likes and downloads them, you get the money.
There are several websites where you can sell your photos. Just google for terms like “sell photos”, “sell photos online” etc and you will find many.
You can take photos of nature, natural disaster, funny images, wallpapers, sports, celebrities, birds, animals, etc etc. An image that is of no use to one person can be worth millions to another person.
Now, don’t expect this work to pay you lots of money instantly. But who knows, you may find a buyer who pays you million dollars for one of your photographs.