What are the best resources for learning about metrics and conversion

What other resources are available to learn about metrics in general and other topics such as segmentation, conversion, KPI etc.

Dave McClure has a good presentation up on slideshare.

http://www.slideshare.net/dmc500hats/numbers-not-napkins-simple-startup-metrics-presentation

There are a few very good blogs that discuss conversion rate optimization and metrics, including:

• http://www.kaushik.net/avinash/
• http://www.bryaneisenberg.com/
• http://conversion-rate-experts.com/ (their blog and "free reports" sections are excellent)
• http://www.grokdotcom.com/
• http://www.optimizeandprophesize.com/

Given the importance of achieving product/market fit - I am fan of this post: http://startup-marketing.com/the-startup-pyramid/ and in particular the quote "achieving product/market fit requires at least 40% of users saying they would be 'very disappointed' without your product".

Although you may already be aware of them, I think you'll like the info on http://www.marketingexperiments.com and http://www.marketingsherpa.com. May not have the number-crunching you're looking for, but overall great data.

Read a lot but you will only learn when you experiment. Put aside a fixed budget that and spend it equally on all your different marketing channels.

There is no substitute for real experience.

This is a good site about metric conversion.