Sell your status updates for your Twitter, Instagram, or Facebook accounts. You will be given your choice of certain advertisements that will show up as a status update posted by you on your favorite online social media. You get paid more for the number of ads you post and followers you have. Visit ad.ly.com for some introductory advertisements.
That said, lot's of people are making extra money by publishing their own books on Amazon. For instance, my friend Bob published a few books on Amazon on how to make money blogging and has done very well. The first book provided basic tips for a small price, but his next book, Pro-Blogging Secrets, is offered at a premium price and he also has an online course.
My local Craigslist.org is the first place I go to sell something. It's best for items you think will appeal to everyone (therefore justifying the smaller audience) and large items that can't be shipped. Craigslist.org is great for taking your yard sale items online for local sales. For example, a friend recently bought two fans from people that live close to him. These one-off type items do very well on Craigslist. Just remember to use common sense and be safe out there.
If you actually enjoy putting together Ikea furniture or standing in long lines, you may be cut out for doing tasks for others. Websites like TaskRabbit can connect you with people who need help with a variety of things. Moving, cleaning, delivery and being a handyman have the “highest earning potential,” according to the company. Read about how to get started on TaskRabbit.
Creating a jobs board website can be another profitable venture. The ‘jobs’ field can be quite saturated, so it is important to find a niche that is still crying out for a jobs board website. Monetize this type of site by charging businesses to list their jobs on your site. Those searching for jobs could also be charged a fee to access the higher paying job adverts.