Logs, well, I fear I'll have to live life without them.
My first job was at an audit firm; later I switched to a law firm. I kept time sheets, initially in 10-minute chunks, later every 6-minute chunk.
Somehow the pressure of having to justify every chunk of time in a working day translated into a profound dislike for logging activities. If I can avoid it, I do.
The only times when I keep a "log" are now when I follow a specific training schedule. I just put the training plan on a pin board or leave it lying about in a convenient place, and tick off training sessions as I do them, and come the end of the training period, the schedule goes into the bin.
Silly? Maybe. But at least it keeps me sane and happy to continue jogging, cycling, swimming, the musical instrument and the like. Keeping logs somehow takes the joy out of whichever activity I start logging.