Greg Fullard has written a great two part blog discussing 20 things to consider when working with requirements.

You can find the article at:

Part 1:  http://blogs.ittoolbox.com/cio/modeling/archives/20-checkpoints-to-ensure-that-your-requirements-work-part-1-of-2-16575

Part 2: http://blogs.ittoolbox.com/cio/modeling/archives/20-checkpoints-to-ensure-that-your-requirements-work-part-2-of-2-16695