Once you are logged in, you can change your password at any time from your profile settings.
1. In the settings menu, click My Profile.
2. On your Profile page, click the Change password link.
3. Enter your old password and then the new password underneath. You can click the eye icon to reveal what you have typed in and make sure there are no typos.
If you have forgotten your original password, but are still logged in, you can just click the Forgot it? link.