Trying to overstay your visa is unwise. While some people may do this, it opens you up to significant legal problems. To stay in the Netherlands legally, start with the Expat Guide to the Netherlands. It details every step of moving abroad including info on visas.

Your best option is to find work, but this is not easy:
"The first way is to apply directly to companies. If the company would like to hire you, then they will start the permit process for you. There is however a long process involved. First, the company has to prove that it is in their best interest to hire you above all other Dutch and EU candidates. Next, they also have to prove that the job has been advertised for at least six weeks. They also need to confirm that they have interviewed Dutch and EU candidates but still think that you were the best person for the job. If you obtain a work permit through a company, this work permit is bound to the company. If you stop working for that company, the permit will no longer be valid.

The second way of getting a work permit is to have a Dutch or EU partner. Your partner must be living and working in the Netherlands and be willing to sponsor you. i.e. they agree to be financially responsible for you while you are looking for a job or if you happen to lose one. The two of you must prove that you are in a relationship and that you live together. If the relationship should end or one of you should move out, the permit will no longer be valid."

The embassy has info on visas: http://www.dutchembassyuk.org/consular/index.php?i=26

Best of luck!