But I am a big believer in roles. The reviewer role is different than the creator role. When I mentally switch, through the priming mechanism of my code review tool, I am often able to see the defects in my own design or code.
I sometimes do the same thing with design docs or proposals by imagining myself as the person who has the most to lose by my proposal succeeding and then commenting on my doc from their perspective.
But I have another checkpoint. I always diff the code and review it as if I had to show it to a reviewer. If I need to explain something, it should be made better.
"Your what?"
"Look it up."