I'm doing beer kits, not extract, but here are some thoughts . . .
Date and time of when you do things - I frequently forget when I did something so aren't sure how many days its had.
Ingredients & quantities. eg bottled water; treated tap water; or reverse osmosis water? Cane sugar; inverted sugar (eg golden syrup); dextrose or beer enhancer? Spray malt (how much and how light/dark)? Yeast.
How long do you boil for?
Anything you observe - unexpected scum floating on top. I use a camera to help me with this.
Gravity readings (starting, and when checking to see if its ready for bottling).
Temperature measurements, when you do them. I started off doing them every 3 hours (like a worried new parent), now I only check it if its been very cold and/or I've put the tray heater on, which might make it too warm (like a parent on their 5th child
). { Note to self: I must get on and build a brew fridge - I've read some excellent guides in the
brewing how to section, that make it look like childs play }
How much priming sugar you use; and type of sugar. I've just started batch priming, so I'll need to see how much sugar works for me. I've seen numbers like 80g - 110g for 23L depending on style - more for largers, dissolved in 500ml of boiling water. I might try drawing 500ml of beer out and boiling that to dissolve the sugar.
M