Work-search log: how detailed does it need to be? - what worked for you?

I have been applying to about 4 jobs a week as a procurement assistant, but I am unsure what my state wants in the log. I also did a résumé workshop at the library.

I record the date, the company, the job title, how I applied and any contact name. It takes a minute each and it covered me when I was asked for proof.