I had problems, the two things that worked for me was stepping away for even 5 to 10 minutes (longer better) and going to a empty conference room and reading it out loud.  You can hear your mistakes, read slow and listen to what you are saying.  After a while you can train yourself to read slow and aloud but in your head.   It helped me.   Good luck, I can relate to this problem.

I have had good bosses and bad bosses but for the past 2 years I am blessed to have the best boss of all.  I hope we continue a long partnership.   We just click well together.