I keep a record of most things I grow,some very basic, but certainly the toms, squash corn and beans are quite intensive.
It is nothing fancy, just a book, a new one each year.
Page for each variety, planting date, transplanting date, comments on weather at various times, problems with germination or not, pests, growing problems,maturity dates , storage info on squash, weight of squash and number, size and weight ot toms, taste, density,colour,shapes etc. Fertiliser used etc. Where I bought seed.
General stuff like that.
XX Jeannine