You cab make your hobby useful and making some money. Planning you time and find the right methods helps you to utilize the hobby better.If you have any special or specific interest on any topics then start writing on it. But always write something that others like to read, or other may find that useful.Turn your photography hobby into a business. Its simple, you have to take nice and catchy snaps, put them for sale.A freelance is the one who works to different employers without a long-term contract. This depends on your skill set and interests.If you are good in typing then you could join for typing jobs.http://blast-off-network.net/
i guess it depends what your hobby is and also if you are knowledgeable or good at it. i would think every hobby has a way of making money.