Proofread... and proofread again

At a writing conference this weekend, a woman handed me her business card and urged me to keep her in mind if I needed an editor for my next manuscript. I looked at her card. Her title read, "Writer and Edtior."

I thought the mistake inexcusable. And then I noticed that one of my handouts featured a glaring typo of its own.

I know it's difficult to proofread your own work, but does anyone out there have an idea on how to do a better job of it? Sugestions apreciatd.