Avoiding common mistakes

Read about the most common performance appraisal errors at the link below:

http://onlinesurvey.surveyshack.com/blog/bid/35060/The-5-Biggest-Performance-Appraisal-Errors

Based on what you’ve learned, what would you recommendation to help managers avoid these common errors when evaluating employee performance? Be creative (yet professional), and don’t repeat someone else’s ideas. In your response to a colleague’s post, comment on his/her suggestions.