These days, more people are engaged in a side hustle. From selling products online to picking up extra copywriting or design work, there's virtually no limit to what side hustles can be. Nearly half of Americans have a freelance gig — especially Millennials — due to stagnating wages and rising costs of living. You may not need a side hustle, but if you have spare time, you might as well use it to earn some extra money and make your life a little easier. Here are some great side hustle ideas.