Know someone who rents out property to others? Perhaps they could use a hand managing their property. If so, you can make a decent amount of money on this side business idea with relatively little work on your part (most of the time). It'll take some hustling and the willingness to be flexible with your schedule, as you'll be responsible for collecting rent checks, managing repairs and improvements, and simply being on call for emergencies. But, a property manager is essential for most real estate investors that have a large enough portfolio, so there's definitely merit to this business idea.
Using a food delivery service can’t necessarily earn you money, but it can help you save you money if you constantly find yourself throwing out half the food you buy. Food delivery services send a box of food every week with new, sometimes unique vegetables, meat, fruit, and so on. If you don’t have time to shop and want simple meal-prep that leads to a good meal, a food subscription service may be perfect for you.