All mental hygiene is based on the core practice of doing nothing. Most of us are good at wasting time, staring at the wall while telling ourselves we should be working. We call this doing nothing, but our brains are furiously active. We think constantly, and our thinking is often rife with distress.
Life is full of tough decisions, and nothing makes them easy. But the worst ones are really your personal koans, and tormenting ambivalence is just the sense of satori rising. Try, trust, try, and trust again, and eventually you'll feel your mind change its focus to a new level of understanding.