Cash is fanned out from a wallet in North Andover, Mass., June 15, 2018. Some people may want to fast-track their savings because they have early retirement goals or want to catch up after a period of not saving as much as desired. No matter what your motivation is, it’s possible to increase your retirement savings by getting a side hustle. However, it’s important to have a plan in place for that side hustle income so the money goes toward your retirement goals and not other expenses. (AP Photo/Elise Amendola, File)