You may want to keep a daily handwritten professional journal that contains a daily diary of your work day—who you’ve spoken with, what was discussed, your daily personal assessment of your training and progress, problems with coworkers, things that went right and others that could have been handled differently or better.  It is a handwritten record in the event there is a problem with a coworker or subordinate, that you can show your chain of command.  This journal can also be used to write letters of recommendation for someone years later, with specifics.  This can also be an excellent tool when you need to provide bullets for your fitrep.