Ever since I tried Sphinx of Imagination by Hypnotica (slightly over 50 minutes), I can't get enough of it. I listen to it every few days. It puts my mind into a really calm state from which I usually go into such a super state that it's ridiculous. Last time I was listening to music afterwards and for 2 whole hours I was enjoying myself so much that I didn't think it was possible. I was in such a good mood that rehearsing material and coming up with new stuff was effortless.

I did try something from Ross Jeffries, but after Hynotica it was all just meh so I stuck to Hynotica.
I'd say that listening to audio like that can fix some minor issues in you and scratch on the bigger stuff so you can fix yourself easier. And it can also definitely get you ina good state. But as Basherdurch said, if you want lasting results, you need to get out there.
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