Photos of people can only be sold for commercial use if they've signed a 'model release' that gives you permission to use their image (children need a parent/guardian to sign). Without a release, these photos can still be sold for editorial use, as long as they were taken in a public place – eg, if you submitted a 'breaking news' shot with people in the background. If there's any doubt, always ask permission.
If you wish you had a little more money in your pocket, you’re not alone. Fortunately, you have a variety of options when it comes to making money. Doing odd jobs is a quick and easy way to earn money. Similarly, reselling items or selling items you make can earn you extra cash. As another option, earn money online by writing a blog, freelancing, or doing online surveys.