In GTD and personal kanban, you put all tasks and projects into a backlog/todo column. Where do I put things that I have to 'keep in mind' when performing those tasks? For example: every time I want to take a day off, I need to notify my boss. I sometimes forget this. How would you put this in your todo list?
It's always a tough one - I use a lot of physical things in my work - so I have to remember to switch off my monitors before I leave the office - so when I plug them in in the morning I thread the plug though the strap on my bag - so I can't leave with out unpluging.
With reguards to the taking the day of - I would have two possibilities - when you put your own day off into your calendar, you either have a note on the calendar saying "and who do you need to tell about this" or you make it part of your weekly review" For my part I have a weekly brain-dump/trigger list before meeting my line-manager to make sure I get everything sorted then.