An excellent way to make money (although you will need some capital to start) is to buy and resell items.
If you are good at writing, you can sell some of your writing online. For example, bloggers often buy listicles to publish on their blogs and can quickly turn around for some quick cash.
Stand outside a home improvement store. Look at people buying oversized items or renting trucks and materials for the day, and let them hire you to help them do some manual labor for some quick cash.