I really like the idea of writing poorly written ads. It seem like it can be easy and you can make a small profit. I know that use to work at a school and we got our extra money from writing grants. People can write grants to start a business so I am in the process of trying to write my own grant to start a community program for teens. its a litte extra money and I still get to do what I love. If you have any kind of hobby you can prob. turn that into some income if you can get creative. Good luck
You can sell your ebooks through Amazon's Kindle program or Apple's iTunes Connect, which gives you access to a large majority of the digital-book reading market and the barriers for entry are incredibly low. You don't need to invest lots of money to make this happen, but you do need to invest lots of time, not only in writing the ebooks, but in marketing them as well.
I see a comment made by Stella including some freelance sites. This does work. I use oDesk and it’s been a big help in bringing in a little extra money. I also agree with some of the other comments that mention people should think of or view more ideas of making extra money, because it really is possible to make extra money instead of just sitting around moping about not having money to pay the bills or buy something special.