Today, it is not uncommon to hear of adults with full-time employment doing freelance work or other jobs on the side. “Side hustle” refers to any additional income streams that one has. For many Americans, especially millennials, bringing in an additional paycheck is almost the norm. Fortune.com writes that about half of the adults in the United States under 35 report having a side hustle. These can range from dog walking or driving for Uber as part of the gig economy, to consulting or digital work and everything in between.