Investing in stocks is another great way to generate income or build your net worth. You buy stocks that you believe are undervalued and that you expect to grow in value -- or you simply invest in a low-fee broad-market index fund. That investment should grow over time (remember that stock investing is only for long-term money), making your portfolio more valuable. If you need to turn that into income, you'd simply sell some shares.

 If you’ve got some free time and don’t live in the middle of nowhere, becoming a Lyft driver can be a very lucrative side hustle that allows you make money fast. And right now, they’ve got a promotion going on where any new driver will instantly get a $300 bonus after completing their 100th ride. If you start now and hustle hard on the weekends, you can probably unlock that bonus within a few weeks of driving (and that’s in addition to your normal earnings).