I don't have shirt pockets just trouser pockets. I spend so much of my time upside down anyway that even if I did have them I wouldn't put things in them. Left trouser: phone and spare battery Right trouser: Permanent marker, spare knife blade, lighter and sometimes a pen should it escape from my hair Back left: nothing usually as I'm right handed Back right: change generally coppers and receipts. I should just add that I package and despatch bags for a living so I need the knife to cut the boxes down if the contents are an awkward shape. I don't smoke either but the lighter is useful for burning away loose threads that scissors can't get to.