If you find yourself wanting something expensive in the quest for immediate gratification, divert yourself with a small indulgence rather than giving in to the large one. Walk away from the designer suit or purse, but buy an ice cream cone or catch a movie instead. The $8 movie ticket is a lot less expensive than the $800 purse but may give you the same feeling of doing something "just for you."
Start a photography business and sell your photos online. If you have a nice DSLR camera and take good photos, do photography sessions or take photos of events, like parties and weddings. As another option, create fine art photos that people may want to hang on their walls, or take stock photos to sell online on sites like iStock Photo, Shutterstock, or Alamy.