Observations: Last night I slept about 10 hours, as opposed to my usual 4-5 hours. I also recently shaved my head (which exposes my scalp to more fresh air and sunlight). At the same time, for the last three days I have not eaten any fast-food. I have also not used a medicated psoriasis shampoo for about 72 hours. Whether or not these factors have led to my psoriasis dying down quite a bit, remains to be seen over the long run, but the fact still remains that my psoriasis symptoms have been almost totally absent for the last 36 hours or so. I got the urge to scratch a dozen times at the most today (plus one more just now since I was thinking about it).
Of course it is also possible that my symptoms have just died down on their own and would have done so regardless. This is why anyone (including myself) who is seeking a long term, lifestyle-based solution to psoriasis has to view the results over an extended period ovserve consistent, repeating patterns.
My hypothesis is that, the more healthy little tweaks I make to my lifestyle, the more my psoriasis will improve.