I carry a notepad when I price a job. My memory is famously bad amongst my mates.
I forget dates, names, measurements, makes, models, sizes you name it. So I write everything down.
That's just me. I've had people comment on how organised I am, but they don't know the half of it. I'm totally unorganised, but with the help of Mrs Dannypipe (Sophie) I manage to keep my affairs together. Just about.
For example I went to a simple job last week, basin change and water heater. I had forgot what I needed as hadn't written it down. I bought bags of waste fittings, bags of 15mm elbows, and about 6M too much pipe as I didn't want to have to go out and pick stuff up in the middle of the job!
The truth is, if your memory is as S***** as mine. Yes, make a list, take photos, and do everything you can to help those lazy brain cells spark into action!!
PS- thats another thing. When quoting I always photo and sometimes video (with commentry) the job so I have something to look back on when I type the quote up. Jogs the memory and though I say it myself, my quotes are normally water tight. (Xcuse the pun).