Here's my exposure record. Maybe it will be of use to the OP and others formulating one for themselves.
I shoot sheet film, not roll film. Every set-up gets one of these exposure record sheets, but this often includes 2 or more actual sheets of film.
I made this in MS Word, and print them out one-sided. Other notes can then go on the back. After cutting apart and punching holes, they fit in a small six-ring pocket notebook, which is easily obtainable in the U.S. (I have another, slightly different format for Europe).
The exposure record stays with the negative through processing and is filed together in the binder with the neg. All my holders have a numbering system filed into the flap for easy ID.
The arithmetic values for the Zones are useful when making multiple exposures or pre-flashing. Important subject areas are identified and the exposure value from my meter entered under the appropriate zones. The bottom of the record is a worksheet for adjusting exposure for reciprocity, bellows extension and filter factors (I have tables for the first two in the same notebook) and is therefore more than just a record.
Although I agree with Ralph that often time is of the essence and keeping records gets in the way, I usually have time when determining exposure and after the shot to keep notes. It helps me to see graphically where the values fall on the Zone scale.
For roll film one would have to modify somewhat; perhaps making a sheet for several exposures.
Hope this helps,
Doremus
www.DoremusScudder.com