Fishing Log

I have been keeping a super specific log for muskies for years, and am now starting a simpler log for bass. 

For my detailed muskie log i keep track of every fish seen and/or caught.  i include everything from, water and air temp, general wind speed and direction, water clarity, location (rocks, weeds, weed lines, depth, drop offs....), time of day, barometric pressure, size, and lure used.  This really helps with patterns when fishing gets tough. Yeah i know, i go overboard but when you put in an average of 10-40 hours per fish caught its worth it.

I dont think you have to be nearly as specific for bass, but simple estimations of water temp and clarity, weather, structure, lure used... would be a good place to start after catching a nice fish.