Take a pile of books from your bookshelf or clear your bathroom cabinet into a box and set it down in front of you.
Then start allocating each of the items to one of the cards you have laid out.
I did say it’s not rocket science, but how you do this bit is important.
You’re going to want to get up and put things away and start to sub-categorise … don’t!
Remember this stage is just about weeding.
Trust your first instinct or gut feeling when deciding, working swiftly through and piling things next to each card.