I always keep possessions in the same pockets.
Hanky and keys in right trouser pocket, Wallet and comb in back trouser pocket, Money (change and notes) in left trouser pocket.
I have no idea why I do this but I always have. SWWLTBO watches me fill my pockets from the dressing table every morning and thinks it is weird...... Come to that my first wife said the same.
Oh and it has to be a clean hanky every morning whether yesterday's was used or not, all notes (money) must have the Queen's head on the same side and be folded in half.
I get very annoyed with cash machines that dispense notes mixed up and spend time putting them the "right" way round before I can put them in my pocket.