Here are a few quick tips

Log in to Cpanel

Browse to http://yourwebsite.com/cpanel and enter your user name and password that was sent via email. If you forgot your password click on the reset password link.

If your website's domain name is new and not propagated yet. You can access it via http://xxx.xxx.xxx.xxx/cpanel and enter your user name and password.

Your IP address was included with your user name and password.

Log in to Web Host Manager (WHM)

Browse to http://yourwebsite.com/whm and enter your user name and password that was sent via email. If you forgot your password click on the reset password link.

If your website's domain name is new and not propagated yet. You can access it via http://xxx.xxx.xxx.xxx/whm and enter your user name and password.

Your IP address was included with your user name and password.