Start a photography business and sell your photos online. If you have a nice DSLR camera and take good photos, do photography sessions or take photos of events, like parties and weddings. As another option, create fine art photos that people may want to hang on their walls, or take stock photos to sell online on sites like iStock Photo, Shutterstock, or Alamy.[12]
In addition, I've been talking about conditions to maximize productivity and creativity and moneymaking ability. There are other considerations in organized human groups, and there are conditions under which productivity is not the thing you're most interested in. There are conditions where more centralization may be appropriate. For example, during a war, you do not want your air force, army, and navy to be fiercely competing with each other, but instead you want during a war more centralized control than you do in peace time. And there are also human groups for which productivity and differential money-making ability are not the overriding consideration. I don't want you to go home tonight and each of you to say to your spouse or significant other, "Darling, I've just heard this guy Jared Diamond, who says that within human groups competition is what spurs productivity and innovation, and so I think we need to follow his advice in our household. For the next month let's see which of us earns a bigger income, and at the end of the month the bigger income-producer will keep on with the job, and the one of us who has lower income and is less efficient can turn to scrubbing the floors and shopping at the supermarkets." That just illustrates: there are other considerations in a marriage than optimizing productivity.
With Shopkick, there’s no purchase necessary to earn cash back. In order to make money with Shopkick, all you have to do is download the app, enable your location services, and start earning kicks. You’ll earn points just by walking into a store, and even more points for scanning items or making a purchase. Payout comes in the form of gift cards to your favorite stores, including Walmart, Target, Sephora, and Starbucks to name a few.
As you likely know, Airbnb is a popular website where people can rent out a room or apartment from ordinary folks and bypass a hotel. So, if you’re comfortable with strangers and you live in fairly well visited place — a large city, college town, or tourist area, for example — you could make some money renting out a room in your home while you’re there, or renting out the entire place while you’re gone. You can expect to make less than whatever nearby hotels charge, but that can still top $100 a night pretty easily. In fact, Airbnb is the most lucrative of all the sharing economy gigs, according to one study.
If you want to become rich by your 30s, you should be looking at wealth-building opportunities that pay off quicker than traditional long-term investments. One of the best ways to do this is to get into the entrepreneurial game and own your own business. Once you own a business, you have unlimited potential to earn, although you also assume more risk.

It turns out that the German beer industry suffers from small-scale production. There are 1,000 little local beer companies in Germany, shielded from competition with each other because each German brewery has virtually a local monopoly, and shielded from competition with imports. The United States has 67 major beer breweries, producing 23 billion liters of beer per year. Germany has 1,000 major beer breweries, producing only half as much beer per year as the United States. That's to say that the average brewery in the U.S. produces 31 times more beer than the average brewery in Germany.

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