If you belief everything your mind tells you, you will suffer greatly. The mind is a wonderful tool for doing many tasks. Best for you to be the task master of your mind. Use if for the purpose for which it is intended and learn to distinguish between truth and distortion.

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For me, the only way to stay clear is to meditate. I've tried stopping, when I feel really good and clear and it is amazing to watch how things go sour within just a few days. I sometimes wish there was a magic pill where I could just keep my aeriel perspective without having to do so much practice but witness consciousness is like any other muscle. Use it or lose it.