The vast majority of people imagine working a forty hour week, and then earning a pay check for the job they have done. That is, in fact, how most people support themselves year after year. But did you know that it is possible to continue earning income even after you stop working. Creating a stream of residual income might be something you want to take a look into and get some more information on. 
Residual income has two real definitions. Let’s look at those first. Residual Income is income that continues to be generated after the initial effort has been expended. Compare this to what most people focus on earning: linear income, which is “one-shot” compensation or payment in the form of a fee, wage, commission or salary. The other definition for residual income is not actually a type of income, but rather a calculation that determines how much discretionary money an individual has available to spend after most monthly bills are paid. We believe that income that exceeds your expenses is called PROFIT! So, we are going to use the first definition for the sake of this document.
Accretion/dilution analysis Adjusted present value Associate company Business valuation Conglomerate discount Cost of capital Weighted average Discounted cash flow Economic value added Enterprise value Fairness opinion Financial modeling Free cash flow Free cash flow to equity Market value added Minority interest Modigliani–Miller theorem Net present value Pure play Real options Residual income Stock valuation Sum-of-the-parts analysis Tax shield Terminal value Valuation using multiples

I have only dabbled in drop-shipping before when I had an eCommerce platform 6 years ago or so. I think it is something that you could do on the side, but you would want to do in depth research on the industry you want to get into before setting up shop. It may be a little less passive up front, but over time you could take your hands off the wheel.
Working as a nurse or a computer engineer for a salary are two examples of active income. In contrast, residual income is income from an investment that earns over the minimum rate of return. You get paid for work you completed once or are periodically overseeing. With residual income, you don’t have to be present or intricately involved to get paid.

Let’s say a company earns $1 a share and pays out 75 cents in the form of a dividend. That’s a 75% dividend payout ratio. Let’s say the next year the company earns $2 a share and pays out $1 in the form of dividends. Although the dividend payout ratio declines to 50%, due the company wanting to spend more CAPEX on expansion, at least the absolute dividend amount increases.

Real estate is the obvious choice if you are going to make money on your money. I personally am not at the point where I can do any of this in a meaningful way BUT my parents are and they now own a couple homes outright and are collecting income from them to power their retirement income. It makes a lot more sense for anyone that has a chunk of cash sitting in the bank and are planning on slowly drawing from it because you technically still have all that money in a property (or multiple properties) and can sell them if you really need the lump sum of cash but you’ll earn great interest payments until you do that.