I learned a lot about how I process feedback on my manuscripts from a post on Penny Lockwood Ehrenkranz's blog about editor and writer Karen McGrath's Seven Stages of Editing Grief. The stages, for anyone else who might benefit, are:
1. Denial: This feedback is stupid and useless.
2. Pain and Guilt: How could I have made such a mess of this?
3. Anger: Who does this editor/crit partner think she is?
4. Depression: Why did I ever think I could write?
5. Acquiescence: Maybe I should at least give these comments a serious look.
6. Reconstruction: If I do this and this and that, maybe I can make this work.
7. Hope: This is better than before. Maybe I can even take it a little bit beyond what she suggested.