How can one learn to work well under pressure?

Meditation: Meditation -- especially mindfulness meditation -- can help you train your mind to focus on present moment. Much of the "pressure" we feel comes from worry about the future or regrets about past, trying to "do better." there are 8 week courses in mindfulness based stress reduction all over the country to get you started. Yoga or tai chi practice are other ways. Find one that appeals to you.