I have a spiral book that I jot down which prints got developed and how. For the negs, the print files are marked in black felt pen designating developer, dilution, times and temps, type of agitation, which camera w/ which lens, which film, w/ or w/o a lens filter, along w/ a date.
The print info goes into the spiral book describing the type of paper, developer (it's always Dektol at the same dilution), date, and exposure times. If there's any dodging, burning or filters used on the print that is noted, and the test strip and test print, if any, are put into an envelope and taped to the page. There's also a number written on the back of the print in permanent marker, and that is duped in the top corner of the page info to find things later.
This may sound a little anal, but if it's not done this way I'm lost later on. It's all very different than my painting or drawing, where things are thrown away if they don't work 100%, or simply painted over and I could give a rip how the image got there. W/ photography I have to be organized or it's a real mess. Many years of market and medical research, along w/ working w/ OSHA, trained me to keep accurate records or I can't find what I need. I would much rather spend time to file things right than search for what I want later.