This morning a client of mine turned me on to a cool tool on Google. Definite copywriting implications -
http://www.google.com/trends
Interesting to note that both the terms "Copywriting" and "Marketing" had their search peaks back in 2005 and have been steadily declining.
I also searched Strategy Process and was surprised to see it fell flat during the year end, year beginning period. But peaked closer to summer. That's a pretty good clue on timing an offer to that market.
The terms "sales" and "management" also peaked in 2005.
Not sure what was happening in 2005 but it seems people were far more interested in working and selling that year over this year.
Anyway, have fun, search away.