It is important to know specifically how to recall your dreams because there is no point in having lucid dreams without remembering them. It is worth getting your dream recall up to a few dreams per night for exactly that reason. Becoming familiar with your dreams will also increase your chances of becoming lucid in one. We have REM dreams approximately every 90 minutes of sleep, and while they start off at about 10 minutes, they increase in length to over 45 minutes. If you wake up while you are dreaming, you have roughly an 80% chance of remembering your dreams. Therefore, try setting an alarm clock to 4½, 6, or 7½ hours after you think you will fall asleep. This should wake you up directly from a dream.