I 've been reading "A New Earth" by Eckhart Tolle and taking notes as I read -- I do this a lot with books I think have important messages that I want to remember. I usually put my notes in a journal and refer back to them when I find myself asking, "What did that book say about [whatever topic]?"
Anyway, so far I've found a lot of useful information. The one thing that has stood out the most for me is this: Not only must I be aware of when the ego is at work in me I must also be aware of when the ego is at work in others and not react with resentment, by taking it personally, or by becoming defensive. These reactions are also from the ego -- it does no good to respond to ego with ego.
This is something I need to work on. I don't often take things personally but I'll admit that from time to time I catch myself thinking, "I can't believe she would say such a thing about me!" or "How could he do such a thing to me?" The "to me" in each of these are evidence of the ego at work. They are evidence that I am responding to the other person's ego with my own ego.