We need to measure, but what are we measuring for? Like many people I have tended to ignore metrics, because I was too busy selling, or perhaps not interested enough. Preparing a lecture on metrics made me think - perhaps I should also wake up to myself!
Dave Chaffey has some good articles, and I have signed up to
Google Analytics which is free (for up to a million page impressions). This
FT.com case study is also pretty interesting.