Your Imaginary Self
The easiest way to break into online accounts is to use the "forgot password" functions on many sites. You are then asked a series of questions only you should know. However, with blogs and social networking sites much of the this information is now public. For example, if you have your high school listed on your linkedin page then it is easy to find the mascot. Use a geneology site and it is easy to find your mothers maiden name. Think you are careful and don't publish any of this information? Are your friends or family blogging about your birthday party? Your birthday is now easily found.
It is this little bit of detective work that allowed David Kernell to break into Sarah Palin's email. All he had to do is find out that she met her husband in high school and then find out the name of the school.
The solution is to use fake information. Answers that are not true but you can remember.