How to use a side job to save for retirement

With the gig economy growing from year to year, it can make sense to pick up additional work on the side to bring in some extra cash. But if you’re not careful, those funds from your side gig could quickly get eaten up in day to day living. For a piece that outlines how to put those earnings toward the golden years, I’m looking for tips and advice on how to set up a plan to put money earned from a side job toward retirement.