I don't actually advocate 100% ignoring it. I know from personal experience that negative feedback is very hard to handle. I don't believe in just "positive thinking" or "ignoring negative experiences," I believe in using specific mental habits to manage my own thoughts and emotional responses.

What has worked best for me is a methodology called "Learned Optimism:"

https://en.wikipedia.org/wiki/Learned_optimism

I wrote about my experience with it here:

https://github.com/raganwald/homoiconic/blob/master/2009-05-...

It's not the only methodology, there are other very good ones in the popular (but excellent) books "Feeling Good" and "Mind Over Mood."