Your lighting log and visual diary should inclue a lighting sketch for every shot in your final portfolio. In addition to the sketch, you should include all technical data from EVERY shoot:
lens focal length
type of lighting gear
meter readings from the meter!
Type, number and location of fill cards
lighting ratios employed
ISO and color balance
film or digital
Any difficulties encountered
It should also include clippings from publications and/or printouts from the web of images that interest you.
Here is an online lighting diagram tool and a set of downloadable pre-made icons for use in photoshop.
And here is the strobox app for phones