First forget what time it is for an hour do it regularly every day
then forget what day of the week it is do this regularly for a week then forget what country you are in and practice doing it in company for a week then do them together for a week with as few breaks as possible
follow these by forgetting how to add or to subtract it makes no difference you can change them around after a week both will help you later to forget how to count
forget how to count starting with your own age starting with how to count backward starting with even numbers starting with Roman numerals starting with fractions of Roman numerals starting with the old calendar going on to the old alphabet going on to the alphabet until everything is continuous again
go on to forgetting elements starting with water proceeding to earth rising in fire
