There's a growing demand for professional survey takers, and there's decent money in doing so. Professional survey sites like Swagbucks, Paid Surveys or Survey Junkie and earn up to $250 per month, or earn survey swag like gift cards and new products just for participating in free-to-take surveys. One piece of advice - if any survey site asks you to pay to participate, keep looking - there are plenty of survey sites that allow you to register for free.
Samples. You’ll need some samples before you can really begin marketing yourself. Figure out which market you want to approach first, and then find or create some related samples. For instance, if you want to try your hand at blogging, study some successful blogs, and then write a few posts of your own to use as samples. Do this for any and every market you’d want to write for.
Americans don't stay put as much as they used to. Millions of people relocate each year, for new jobs, for retirement, or just because they want or need to. Many of them need help packing up their belongings, loading it all onto a truck, and moving it. You can help with that, if you're strong, whether you have a truck or not. The task of loading and unloading items professionally is known as "lumping" -- and you can do an online search for lumper gigs, or you can check out sites such as SimplyHired.com or Indeed.com.
Outside of starting your own business, investing in the stock market has been one of the most consistent ways to create wealth over the past 100 years. In fact, since its inception in 1957, the S&P 500 has consistently returned 8% per year on average. A far higher return than savings accounts, CDs, money markets, or any number of other vehicles for saving and investing your money.
Companies like Uber and Lyft offer a great opportunity to make some quick cash. You'll need a clean driving record, a fairly new car and the authorization to work wherever it is that you live. If you have all of those things, you can work when it's feasible for you, whether that's in the middle of the day during rush hour, or in the wee hours of the night on a weekend. The choice is yours.