title: What is the best way to implement "remember me" for a website?
body: <p>I want my website to have a checkbox that users can click so that they will not have to log in each time they visit my website. I know I will need to store a cookie on their computer to implement this, but what should be contained in that cookie?  </p>
  
  <p>Also, are there common mistakes to watch out for to keep this cookie from presenting a security vulnerability, which could be avoided while still giving the 'remember me' functionality?</p>