Brainwave entrainment like Holosync's Centerpointe is good, as I saw mentioned earlier in this thread. It is much less expensive to get Neuroprogrammer 3 from Transparent Inc. and follow the instructions in their forum for making your own levels. Most of the money paid for the levels is supposed to go toward research and paying the support staff. If you buy even one level you can call the support staff indefinitely.
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