Set a metronome to 32 beats per minute, which is a very slow tempo.
Pat four quarter notes at one beat each. Alternate hands as you pat and say "ta" for each quarter note.
Pat eight eighth notes for the next four beats and say "ti" on each eighth note. Continue to alternate hands.
Pat 16 16th notes for the next four beats, using alternating hands and saying, "ti-ka-ti-ka" for each set of four within the set of 16.
Pat 32 32nd notes for the next four beats, using alternating hands and saying "ti-ki-ti-ki" for each set of four notes within the set of 32.
Pat 64 64th notes for the next four beats, using alternating hands, and saying "ti-ki-ti-ki" once more for each set of four notes within the set of 64.