I just read the new blog article by Jakob Nielsen and I want to share this great statement with you:
Usability is like cooking: everybody needs the results, anybody can do it reasonably well with a bit of training, and yet it takes a master to produce a gourmet outcome.
I also have the opinion that everybody - if he/she is interested in the topic - can learn the basic skills to find usability problems in advance (by scribbling screens) or afterwards (by reviewing the application). So, read the article ... it's really great.
Br/Üdv/LG
Claudia