Blow through the instrument as you normally would and buzz your lips, creating a low and slow vibration. This will produce the basic drone that is used as the foundation for specific noises.
Sing while playing the drone to create specific pitches on the didgeridoo. This is a process called multi-phonics in which you create more than one note through a combination of buzzing and singing.
Place your tongue at the roof of your mouth so that the tip hits the place where your mouth and teeth hit to create clucking noises. Flick your tongue downward to the floor of your mouth to create a clucking sound.
Create articulations within the drone using a tonguing technique. The tip of the tongue should hit the roof of your mouth between the teeth and the gum line and then pull back quickly.
Pronounce the syllables "tu-ku" to learn to double tongue. The "tu" syllable creates the initial articulation while the "ku" syllable pushes air forward creating the second articulation.