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Web Design and Development is a great hobby and if done correctly a great career. It's not easy to keep up with trends, changing technology as well as making a customer happy by delivering a product that they want while still providing what they need. Finding that balance is the key to making a lucrative career in Web Design.
If you are not so lucky there are many other avenues to follow, such as being your own customer. I'm referring to developing Websites that interest you and build traffic from the inherit love and knowledge of a topic that is close to your heart. Google Adsense is one of the best tools you can use to profit from doing what you love.