Appraising designs & providing feedback

Jared Spool's article on what goes into a well-done critique is, I think, talking to web development and usability professionals but there are some good tips in there for anyone required to give feedback on a website or application.

He says:

Receiving a critique is probably one of the hardest things we'll do in our work. Giving one is equally as difficult. It's hard to do well and easy to do poorly.

What Goes into a Well-Done Critique? - article by Jared Spool