Check with your local bank to see if they're giving away cash bonuses for opening up accounts. Banks run promotions like this all the time, so grab some real cash quickly if you're in need. It won't break the bank (no pun intended) but it will give you a quick $50 or $100 -- maybe even more -- when you really need it. You might need to deposit a minimum amount of cash (usually in the thousands) in order to qualify for these types of accounts (but not always).
Become a mystery shopper. This means doing business with various establishments and rating their products and services without their knowledge. It may sound like cake, but remember that it requires discreteness, a good memory for detail (ex. the name of every individual who helped or served you), and enough cash for you to be able to pay for your shopping experience up-front and then wait to be reimbursed pending the approval of your review.
A reverse mortgage is essentially a loan where the amount borrowed doesn't need to be paid back until you die, sell your home, or stop living in it -- if you move to a nursing home, for example. At that time, the home can be sold to cover the debt, or your heirs can pay it off and keep the home. Reverse-mortgage income is often tax-free, which is another big plus. The amount you get can be delivered in monthly installments, providing very passive and reliable income in retirement.
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).