To access UIUC Self Service, navigate to the university's website and locate the "Self Service" section. Click on the link and log in using your UIUC email credentials. For UIUC email login, visit the university's email portal and enter your username and password. Ensure you have the correct login details provided by the university. Once logged in, you can access various self-service features such as course registration, financial aid information, grades, and more. Make sure to log out after use for security purposes. Contact UIUC IT support for assistance with login issues or forgotten credentials.