There are a lot of variations on scams out there. In general, assume that everyone is out to get you. It's unfortunate, but assuming the worst is the only way to protect yourself from sophisticated scammers who have perfected their pitch. In general:
Never give ANY information to ANYONE who calls you. What may seem like a harmless survey could be collecting personal data that allows them to steal your identity or access your bank account. If you think it may be a legitimate call, look up the phone number in the phone book or online for the company calling and call them back.
Never click on links you receive via email. Emails can look very legitimate, and will even look like they are from your bank. Never click on the link in the email - if you think it is legitimate, go to your bank's website by typing their web address into your browser and log in from there. You may get a link in an email from a friend - do not click on the link! Your friend's email may have been hacked, or it may only look like it is coming from your friend. In general, NEVER click on links you receive via email.
When in doubt, give us a call at 610-323-5009, and speak to someone here. We can help you identify scams and stay safe.