Hi Sky,
Good grief, I'm comparing and criticising myself all the time! I've tried to reduce it by thinking of it as mental chatter, as if my ego was just a parrot on my shoulder.
The thing is, when we overhear conversations between 'normal' people, on the bus or in bars etc, everybody is at it. They are nearly always talking about a third person (famous or otherwise) and comparing and criticising them.
So, by learning not to compare/criticise, we are unlearning a natural process. Maybe the thing with the 'normal' people is that they are always comparing and criticising others, they haven't turned the weapon on themselves. Maybe that's the difference between them and us?
One thing I do, I never compare and criticise another person who is ill. Normal people are fair game, but anyone who is unwell comes into a special category with me, beyond criticism.
Good thoughts, M