Parlay your math, science, foreign-language or test-prep expertise into a lucrative side gig by becoming a private tutor. You can tutor people online or in-person. What you charge can depend on your experience, expertise and what’s in demand. To get started, see what types of tutors are needed on Craigslist, or create a profile on sites like Tutor.com or Care.com. You can also advertise your services at local schools and community centers.
Invest your savings smartly: You have full control over your spending, at least if you can control your emotions and avoid stupid purchases. It’s a lot different when it comes to investments. There are many factors beyond your control, from market trends to other people involved. That’s why the most frequent way of going from rich to poor is not lavish spending (except for lottery winners), but bad investments. Putting your money in a mutual fund is very far from smart investing. You don’t have to be a full‑time investor (since you have a daily job), but you have to be extremely smart about who you trust to manage your money. As we said, you must become financially literate.
The pay is .25 per minute of talk time. Agents typically make anywhere from $7-$14 per hour. As for the hours, they are totally flexible. You can choose which shifts you want to work each week and the shifts are broken down into half hour increments giving you optimal flexibility. You can even log in and work if you are not scheduled for some impromptu cash.”
Salvage and resell. Do you love antiques or have a knack for finding valuables at flea markets or yard sales? If you do, it might be time to consider salvaging items for resale – or even scouting out antiques to sell for a profit. While you’ll need to spend quite a bit of time searching for prospects and spend some money buying upfront, you could easily turn a profit if you know what you’re doing.
City-dwellers often don’t use their cars for days or weeks at a time. That idle time can translate to money with services like Getaround and Turo, which let you rent out your car by the hour or day. Earning potential varies by car and location, but standard vehicles typically rent for $30 to $50 per day. Luxury cars and sport-utility vehicles command even more money. Just be sure you talk to your insurance provider before signing up to make sure that you don’t run afoul of the policy.
I am a teacher and social media administrator for Magic Ears! We are an online ESL company based in Beijing, China! We pay all new teachers $22 an hour after bonuses for arriving to the first class of the day early and having at least 60 slots open for availability each month. We are hiring North American Native English speakers that have an ESOL cert + 8+ months online ESL teaching experience OR 2 years online experience or 5 years offline experience.
I advocate for the Tim Ferris, multiple income stream strategy. It’s important to have a diversified portfolio and automatic income streams that supplement your basic income earned through work. Selecting the best investment and income streams requires a person do the research, but very basic strategies can be employed that grow the money nest. I think the article is right to say it’s better to earn rather than save more than you spend, because saving money can depend on very specific contexts, while earning money tends to be more predictive. Good article.
Don't put all your trust in Social Security. While it's a good bet that Social Security will continue to work for the next 20 or so years, some data suggest that if Congress doesn't radically alter the system — either by raising taxes or reducing benefits — Social Security won't be available in its current form. It is probable, however, that Congress will act to "fix" Social Security. In any event, Social Security was never designed to be the only resource for retirees in their later years. That makes it all the more important that you save and invest for the future. 
What a huge, great list of ideas – bookmarked this as I know I’ll be coming back to go over it again and again. Here’s another item that could have made the list. I found a financial directory that’s useful for info on making money online. It’s http://money.madbeetech.com. What I like about it is that each directory listing includes ebooks and videos that can be instantly downloaded. All sorts of stuff for people who have their own website, and people who don’t (but still want to make money online).