To book a slot for AP EAMCET, first visit the official website: cets.apsche.ap.gov.in. Log in using your registration number, qualifying exam hall ticket number, and date of birth. Once logged in, click on "Slot Booking" and choose your preferred date, time, and exam center. Confirm your choice and take a printout of the confirmation page. Make sure to book early, as slots are filled on a first-come-first-serve basis. Don’t forget to carry your hall ticket later.