A technique called Bellows breathing is a good way to get you to beta fast. With your mouth closed and relaxed, hold the tip of your tongue against your inner gums above your upper front teeth while you quickly breathe in and out through your nose. Breath short, even, aggressive bursts of air. Use this technique for about 15-30 seconds, or really as long as needed (although if you feel like you're about to faint, it's probably time to stop).
-Dylan
