How could we exist without the Internet? That's how most of us keep in touch with friends, find homework support, research a cool place to visit, or find out the latest news. But besides the millions of sites to visit and things to do, the Internet offers lots of ways to waste time — and even get into trouble. And just as in the non-cyber world, some people you encounter online might try to take advantage of you — financially or physically.

First rule of smart surfing? Remain as anonymous as possible. That means keeping all private information private