If you're resourceful, the internet can bring you a bit of coin. This is one example.
I've been using this site for a year or so now, and while it won't make you a millionaire can bring you a few extra dollars.
What does it entail? Every so often jobs come up and you can choose to apply for them or not. Sometimes it's as easy as making a phone call and filling out a few questions or sometimes going into a shop and taking note of the shop assistants professionalism. You then fill out a survey and send it off within your deadline. So you're basically whats known as a "mystery shopper" working for a company to ensure that businesses are doing their job correctly.
What are the requirements? You need to be 18 or over. you need to be able to scan a proof of age to confirm that. You need a paypal account for them to put money into. for some jobs you might need a camera and have access to a fax or scanner. And in order to get to some jobs I guess you would need some form of transport be it a car,bike, bus or train.
Last month I made just over 500 dollars tax free. Not a lot but I don't really do it for the money it's just a bit of fun, money is just a bonus. People who are motivated can make a lot more. There is no contract or obligations though, you just do what you feel like doing. If you only want to do 1 job a month or even 0, that is entirely up to you, just means you won't get paid much.
Once you successfuly sign up the main portal page will display open jobs depending on your location. You can set it to display jobs up to 144km away or closer if you don't feel like travelling and you will also recieve email notification if you so wish.
Here is the website. http://shopangels.com.au/
Sign up where it says: become an angel or just go to this link: https://shopangels.shopmetrics.com/shopperSignup.asp
As I mentioned it is only available to Australian, American or Canadian residents.