Work in grocery delivery. Instacart is a company that will pay you to pick up grocery store orders in your spare time. The entire purchase and order takes place through the Instacart app, making it easy for you to pick up the groceries your customers wants and get paid. Like other food delivery jobs on this list, Instacart lets you earn a per-trip rate plus tips. Shipt is another service that will pay you to shop for groceries and deliver them to consumers in your area, so make sure to see if they’re available where you live.
I surprisingly get a lot of people asking to detail their car. I never intend to make a business of it, but I love doing it to my cars and people ask me to do it to theirs. All it takes is a cheap orbital buffer (mines a used craftsman) and a shop vac. I normally get easily $100 for a basic wash/wax/vac, or $200 to remove scratches and polish then wax the car.
Even though risk-taking is a generally rewarding strategy in your 20s and 30s, it's also a good idea to diversify your efforts. Don't build up just one skill set, or one set of professional connections. Don't rely on one type of investment, and don't gamble all your savings on one venture. Instead, try to set up multiple income streams, generate several backup plans for your goals and businesses, and hedge your bets by looking for new opportunities everywhere. This will protect you from catastrophic losses, and increase your chances of striking it big in one of your ventures.
If you find yourself wanting something expensive in the quest for immediate gratification, divert yourself with a small indulgence rather than giving in to the large one. Walk away from the designer suit or purse, but buy an ice cream cone or catch a movie instead. The $8 movie ticket is a lot less expensive than the $800 purse but may give you the same feeling of doing something "just for you."
I have cleaned house, done dog sitting and sold items I no longer need. I have complimented my retirement income by about $ 1000 a year paying for a plane ticket, rental car, bed and breakfast, food and attraction tickets for a 3 to 4 day trip. It gives me something to really look forward to. I always pay taxes on the service income I make. Always give value.