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

I have been applying to about 9 jobs a week as a mechanic, but I am unsure what my state wants in the log. I am in Boise, in case local advice matters. My state says to keep records for a year. Has anyone been audited?

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.

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.