As I’ve already covered with TeeSpring, the T-shirt retailing business is worth millions of dollars. But what if you want to do the manufacturing side of things? T-shirt printing turns out to be quite a rewarding business idea for many each year, but can quickly consume much of your side business idea time—so know what you're getting into before diving in. This multi-billion dollar industry counts big corporate factories as well as home-based part-time entrepreneurs.

If you’re the sort who takes apart the computer for fun, operating an electronics repair shop out of your home is a natural decision. In particular, repairing iPads and other tablets would provide you with a great deal of business, as many tablet users are looking for a less expensive way to fix smashed screens and other damages that can be costly through the manufacturer. Median salary: $49,170.
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.
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