. Before going to sleep, meditate in a quiet, dark room. Taking a meditation training course may give better results, but to start out, just pay attention to your breathing, or imagine ascending or descending stairs. The goal is to stop thinking and enter a quiet, comfortable state, and from there slip into a lucid dream.  Keep in mind that "Wake Induced" lucid dreams are rarer and more difficult than dreams that become lucid after you're already asleep. There are many meditation guide videos online specifically designed to help you lucid dream. One common experience among first-time lucid dreamers is waking up due to the excitement of having a lucid dream! Usually, you'll get some warning beforehand as the dream feels "unstable" or you begin to notice sensations from the real world. These techniques can help you keep the lucid dream going:  Spin your dream body around or fall backward. Some people report that this helps, although the reason is unknown. In the dream, rub your hands together. This can distract you from the sensations of your actual body. Continue doing whatever you were doing before the dream became unstable, asserting that you are still in the dream. This is much less effective than the techniques above. If you send a different sound frequency to each ear, your brain will interpret the two sound waves' overlapping pattern as an audio beat even though no beat is included in the sound. This definitely changes the brain's electrical activity, but so far scientists are unsure whether this can actually stimulate lucid dreaming. There are many websites out there with collections of binaural beats, so it's easy to try it out if you can sleep with ear buds in. Most would-be lucid dreamers use beats that mimic Theta brain waves, which occur in REM sleep, but some swear by Gamma or Alpha beats instead, or a progression through several types. Binaural beats can come with soothing background music, or just the beat itself. . Gamers report a much higher rate of lucid dreaming than the general population....

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Write a summary of the previous text in Vietnamese:
Thiền Kéo dài một giấc mơ có ý thức khi nó bắt đầu mờ dần. Nghe nhịp song âm. Chơi game. Xem xét sử dụng galantamin. Xem xét việc dùng thực phẩm bổ sung vitamin B thường xuyên.