Using the money you earn?

I know that we are a lot of people that try to make money online. And I guess we all have different reasons on why we want to earn extra money online. Some of us need to do it just to get even with those bills, and others (like me) want to have some extra shopping money because all the "ordinary" money from work are used to pay bills and buy groceries.
What are your reason for earning money online? Do you want to buy yourself some def leppard concert tickets, or do you have a huge debt that you are trying to get rid of?