Step 1: Find a suitable surface to collapse onto. Ideally, a plush surface with a slight incline.
Step 2: Set your body into a position of maximum relaxation. This often involves contorting limbs into unnatural positions.
Step 3: Close your eyes and focus on breathing, but not too deeply, as this might rouse you.
Step 4: Visualize a peaceful scene, such as a field of sunflowers on a warm summer's day.
Step 5: Repeat as necessary until you've reached your desired level of somnolence.