It's easy really.
Just make a list of anything and everything and everyone that your pis#ed off At.
Mine was 9 pages A4.
Sounds like a lot of work, but believe me, once you get started they just flow and pour out.
I think it was about 2 hours work in total.
A lot of people procrastinate over this one, but I was told it doesn't have to be perfect or even 100% accurate [don't worry if the exact details of something years ago are a little fuzzy]
Just smash out the boulders and there is time to go back and clean up the rocks, stones and pebbles later.
Good luck and God bless