Good advice! I do label my bottles which includes the DOB, NIC, PG/VG and sometimes recipe info... if I can't add recipe info (too long etc) I use the recipe name. I keep a Vape Journal with reference info, what I buy/where/cost, details on each 'recipe' I made (which are named), etc. I don't want to find some sort of super juice that I love, and not be able to replicate it. I also go back and revisit flavors after a while and add that to the record.