There are several ways of avoiding having to retype your personal details when registering on a new website.
First there are initiatives created by major internet companies: for example, if you use Google's email service, your email address and password can be used to sign in to all of Google's applications and services.
Another option: utility programs that automatically fill in forms or data sheets. These utilities, such as RoboForm and Password Manager, remember the username-password combination in secure form the first time you login to a site and then automatically supply it when you return. They thus help avoid endless registration processes. As a result, one can use high-strength passwords, as they are entered automatically on subsequent visits.