If you frequently hear about what a nice voice you have, and even if you don't, you might want to look into doing voice-over work. This is a serious career for some people, and you could pursue having it be your career, but that will take considerable effort. Alternatively, at sites such as Fiverr.com, you can offer your services at a reasonable rate per hour, perhaps starting with a low rate until you've gotten some takers.
It works in essentially the same way as the phone apps that were mentioned earlier. If you don’t mind having Google know what you do on a daily basis (anonymously), you can make money by letting them monitor your Internet usage. They use the information they gather to help them market and increase the functionality of their advertising programs when targeting users that are similar to you.
There are also shopping apps like ibotta, MobiSave, and checkout 21 that give you money back for shopping. And the Walmart app has a savings catcher feature where you take a picture of the barcode or upc at the bottom of your receipt and they search all surrounding store and if a lower price is found they give you the difference back. I have made about 50 bucks total from this app and 20-30 from things like ibotta.
While many people start a home business to create or replace a full-time income, some people simply want to generate a little extra money to pay a debt, save for a rainy day, or use as mad money for small expenses, emergencies, or impulse purchases. In the past, those who wished to make extra money needed to find a second job. Fortunately, times have changed. You can use the assets you have, whether it's skills, knowledge, or unused items around the home, to make money from home, often without leaving your house.
Get-rich-quick schemes and fad weight-loss diets are naturally popular because they satisfy the id while also attending to the super-ego. The ego's job is complete when it sees something like this. The appeal of "fast'' stems from the innate desire for instant gratification, so beware of what seems too good to be true (they often are) when you're looking to make money quickly. Be wary. Listen to the conversation deep within the confines of your mind and do your best to tame the proverbial beasts.