I use binaural beats for meditation, relaxation and to help induce out of body experiences. They are very good at relaxing you and if your tired will probably make you fall asleep. If oyur interested in sound you may also want to check out Hemi-Sync which is a technique and method used by Robert Monroe. These are also excellent! If you use these for lucid dreaming i would put them on very low so they don't awaken or startle you if you enter a lucid state.