Do you have a telephone? Most people do, and even if it's just an old-fashioned land line, there are scammers trying to use your phone to get their hands on your money. Read about some of the most popular scams on this page from USA.gov (which is maintained by the General Services Administration):
you haven't done it recently, you might also want to register your
phone number with the National Do Not Call Registry -
When you're watching for scams and your
caller ID tells you you're calling yourself, you'll know not to answer.