I just want to add that when you join slack, you will receive an e-mail about myetherwallet being upgraded and you should never click that link in the mail because by the time you enter your private key in that site you are redirected, consider your coins already lost. We should also not ignore if the site is http or https because this will be your guide when a site is secure or not. Additionally, always access the sites you are always using bookmark because when you search in google, many advertisement appeared that are just a copy to original site.