I have always used a Franklin Covey daily planner to document my daily meetings and notes. From day one, you will need something to jot down names and goings-on. Keep notes on your time; later on, it may frighten you as well. You hear haggard old chiefs tell you of the double digit hour days that drag on for the first few months--you say "no way." Look back when you are settled and you can add them up for yourself and say he was right, but the invested time was worth it.