I create a word document for each one where the title includes the date, FO, shorthand for oil mix and the mold. This way I can quickly narrow it down by looking at the title in my (eg) Soaps 2023 desktop folder without opening the document. So for example 11-12-23 BB TBL T&SM LACC means:
Nov. 12, 2023, Brambleberry Tabacco Bay Leaf FO, Tall&Skinny Mold, Lard Coconut Avocado Castor oils.
In the document I have all the details of the soap, most importantly for identification purposes, a photo. I also cut and paste the recipe from soapcalc, and include all details of the soap, including names and amounts of additives (usually sorbitol, sodium lactate, edta, sometimes milks, honey, colloidal oatmeal, etc.), Specific details about the colorants - brand, blends, rough amounts, etc. Usually the design, the strategy if it is a complicated design and (eg) I need to work fast with some parts or slower with others, and the order in which they are done.
Basically all the stuff I do in advance to plan the soap that's not included in the formula. If I don't include all that stuff I will 100% forget something during the process of making the soap.
After I make the soap I go back and quickly note anything which went wrong or not as expected. Then after I cut I make notes on how the design/appearance ended up and if I would change anything. Finally, if I remember, I try to check whether or not the FO sticks over time, and if there is discoloration, and make notes on that.
It may sound a bit much, but it is part of the learning process for me, but it is really useful when trying to improve things/figure out what went wrong, and I like having such a concrete record of my soaping journey.