Somebody hacked my gmail!

1) Make sure that all your passwords are "strong" - more than 8 characters, a mixture of upper case, lower case, numbers and symbols and not relating to anything that might be known about you or made up of common words. 2) Use different passwords for everything that you sign up to (or, at least, don't use the same passwords for your emails and for things that contain those email addresses). 3) Don't store your passwords in emails or anywhere else which might be accessed by unauthorised people. 4) NEVER share a password with anyone without very good reason - and change the password immediately that reason has passed. 5) Change your passwords regularly

Maybe you should also check if there is any virus on your computer, and use differnt passwords for differnet account, and strong ones, with combinations of letters, numbers and symbols. Do not link your password to your birthday, cause this is too easy for somebody else to figure it out.

Changing password frequently is good but actually its not really effective because it will only prevent a 'guessing scheme' to work. I know a little bit about cookies hijacking, when you login in a website your browser generating a cookie its a information of your activities in a website, once your session cookie is hacked then anybody can login into your account.These cookies can be easily caputered on unsecured wifi network. Here is some tips : Never accessing your sensitive account(primary email,bank account,etc) in a public network like in a school,cafe,etc because with just a simple tricks a hacker might gain access to your session in the same time when you're logged in (in the same network a computer is connected each other). When entering your password, enter 3 or 4 random characters first(not your password) then highlight it with your mouse and then type your real password. It will fooling keylogger to sending a wrong password. If you save your username and password in firefox, make sure you setting up a "master password" in password manager because with just a simple software a hacker can retrieve all of your username and password stored in firefox which is not protected with "master password". Finally protect yourself :)

i think you might have forget to logout your account its is always recommended not to check remember me check box when login in from public pc change you password to a strong one including strings and all and hope from next time onwards you take care when you login from some where else also never share your password with your friends they might have too did it for fun

Don't trust anyone. I guess you got hacked because someone send you a program and you got tricked.