I do.

I manually keep an Excel spreadsheet to watch trends with my movie titles that I produce.

I wish Affiliates would provide us stats in .csv form so it would be 1 or 2 steps easier to put into Excel.

Keeping track of other things, like when EBAY started cracking down on Gay Adult, and even Gay cinema, video sellers; when PayPal purged adult, and Gay, sellers; doesn't really need a physical Celendar.

Those benchmarks I painfully remember.