http://www.urticator.net/essay/0/48.html
Might be a useful read apropos of Wei Dai's recent question:
Why are we causing [people] to think of LW in terms of identity in the first place, instead of, say, a place to learn about and discuss some interesting ideas?
Why do you think it's tougher to tackle than other human biases?
Personally, I think I've found reading things like the identity essay you linked to and the detachment essay I linked to useful... just like most of the other biases we talk about on LW, it feels (from the inside, at least) like reading the right stuff can be helpful.
The default reaction my brain (and so, generalizing from one example, I expect other brains on LW too) has to this whole program of overcoming biases is "oh cool! I'm the kind of person who overcomes biases now! That makes me so much better than all those other biased people." Successfully overcoming other biases actually makes this one a little worse. But I think I'm okay with this one as long as I'm using it to motivate myself.