Try Gmail - it's the most popular email provider, so I guess there must be a reason!
You just have to visit the site and follow the instructions given. You can choose between signing up if you haven't already got your email ID or signing in if you have already got an account. If you have forgotten any of your email ID information, you merely have to click either the link
referring to losing your password or losing your username/email address and they will send you an email containing your details to the account that you offered as an alternative account when you initially signed up to use the email services...