Starting on July 1st 2008, and running daily across the 25 working days of the month comes a unique feature on Blogit with Billett. 25 things we know about what we don't know

Each day brings a short, sharp insight on marketing effectiveness based on many years of practical experiences, distilled into digestible bite sized pieces, designed for the busiest operating manager and executive to take action. (We have recently shared this with the communications under graduates at Michigan State University and they report with great interest)

Despite the enormous progress made in improving the scientific aspects of measuring marketing effectiveness, the reality is that it remains just as much an art as it is a science.

That is why we can, in all humility, talk boldly about 25 things we know (and there are lots more besides) whilst unashamedly recognizing there's a lot more about what we don't know

We hope you will enjoy the daily diet of the "25 things we know about what we don't know"