Set up a roadside stand. Depending on where you live, you could profit handsomely by setting up a roadside stand. If you live near a resort area, for example, you could buy cases of bottled water, put them on ice, and sell them to passers by for twice what you paid. Selling fruit and produce you grow yourself is also a smart idea in highly-traveled areas.
Even though risk-taking is a generally rewarding strategy in your 20s and 30s, it's also a good idea to diversify your efforts. Don't build up just one skill set, or one set of professional connections. Don't rely on one type of investment, and don't gamble all your savings on one venture. Instead, try to set up multiple income streams, generate several backup plans for your goals and businesses, and hedge your bets by looking for new opportunities everywhere. This will protect you from catastrophic losses, and increase your chances of striking it big in one of your ventures.
However, this can be debilitating, to say the least. That's likely why we see so many get-rich-quick schemes and fad weight-loss diets. We want what we want and we want it now. But we can't expect that if we're serious about making a mark in business or society. Instead of instant gratification, in order to create sheer abundance, we have to do the most amount of work for the least initial return. We have to deliver massive amounts of value, and do so repeatedly. Plain and simple.
Now, it’s time to plan out your show. If you’re doing an interview-style show, you’ll now want to start getting some guests involved. You can use your existing social network to reach out to people you already know or are connected with on Twitter or Facebook. You can also head to Medium or Amazon to find authors or experts on topics specific to your niche.
If you want to clear some space out in your house and have a big stack of books you’ve been holding onto for too long, you can make money selling your books and textbooks online. Stores like Half Priced Books and others will give you cents on the dollar for each of your current books while you can check what your book is worth by simply entering the ISBN number on Book Scouter.
Hold a yard sale. If you have a yard or garage and plenty of items to sell, you can have a yard sale as early as tomorrow. By advertising your sale on local Facebook pages and Craigslist, you can also skip the paid newspaper ad and keep all of the profits for yourself. If you don’t have time to price everything, try asking patrons to “make an offer” or grouping similar items on tables with an advertised price (e.g. everything on this table is $5).
Of course there are also the famous differences between the productivities of the economies of different countries: the differing national average productivities of Japan and the United States and France and Germany. Actually, though, there are differences between the productivities and wealths of different business sectors within the same country. For example, the German metal-working industry has a productivity rivaling that of the United States, so the Germans are certainly capable of organizing industries well, but the German beer-brewing industry is less than half as productive as the American beer-brewing industry. Or take Japan — we Americans are paranoid about the supposed efficiency of Japanese business, and the fact is that the Japanese steel industry is 45% more productive than the American steel industry. Why is it, then, that the Japanese food-producing industry is less than 1/3 as productive and efficient as the American food-processing industry? Still another example: in Korea, the steel industry is equal in efficiency to American steel making, but all other Korean industries lag behind the United States. What is it about the different organization of the German beer brewers and the German metal workers, or the different organization of the Japanese food processors and the Japanese car manufacturers, that accounts for the different productivities of these sectors within a given country?
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.
Avoid purchases that are likely to depreciate rapidly. Spending $50,000 on a car is sometimes considered a waste because it's likely that it won't be worth half that much in five years, regardless of how much work you put into it. As soon as you drive a new car off the lot, it depreciates about 20%-25% in value and continues to do so each year you own it.  That makes buying a car a very important financial decision.
Now let's finally apply these lessons to comparing different industries or industrial belts within the United States. I mentioned that when I was growing up, Route 128 outside of Boston led the world in productivity for an industrial belt, but Route 128 has now fallen behind Silicon Valley. Since my book "Guns, Germs, and Steel" was published, I've spent a lot of time talking with people from Silicon Valley and some from Route 128, and they tell me that the corporate ethos in these two industrial belts is quite different. Silicon Valley consists of lots of companies that are fiercely competitive with each other, but nevertheless there's a lot of collaboration, and despite the competition there is a free flow of ideas and a free flow of people and a free flow of information between these companies that compete with each other. In contrast, I'm told that the business of Route 128 are much more secretive, and insulated from each other like Japanese milk-producing companies.