Sift the powder into the glass bowl using a fine mesh strainer or sifter.
Slowly add the hot water.
Whisk with the bamboo whisk in a "w" shape until frothy and well mixed.
Though I'm sure it violates ceremonial tea procedure, I've also found that throwing the tea and water into my blendtec and blending is just as efficient and creates a frothy drink as well. You can also experiment with adding almond or coconut milk, or even a little honey, though these were not used in traditional teas.