It depends a bit on what bags I carry, what kinda pockets I have, what my needs are for that specific trip and what temperature it is.

Front right:

• keys (2 house keys, 2 USB thumb drives, some decorative key fobs and a carabinier to attatch my bike lock key that needs to be inside the lock while riding)
• 1 or 2 lighters
• tobacco, filter and papers for rolling cigarettes (when I'm wearing a shirt with front a pocket, the rolling stuff goes there)
• anything that's able to scratch my phone screen

Front left:

• phone (pixel 5)
• wallet (random leather wallet from amazon, that held up surprisingly well over the past ~5 years)

In my backpack for longer transit/going to the park etc:

• wallet in the backpack now
• headphones (bluetooth IEMs)
• whatever novel I'm currently reading
• umbrella
• water bottle
• a backup reusable shopping bag
• flashlight (some cheap USB rechargeable LED light with both a focused beam and a bigger LED in the handle for illuminating larger spaces)
• sometimes rolling stuff for joints inside a waist bag

When grocery shopping:

• other, bigger backpack with several reusable shopping bags

When its hot:

• a towel that I often just tuck in my pants a bit so it can dry better while hanging from my waist, when dry I usually keep it in my front left pocket
• usually also a folding hand-held fan, in my backpack when I happen to carry it, otherwise front right pocket

When I go out but don't want to carry my backpack I put the following inside the waist bag and carry that across my chest:

• cigarette rolling stuff, unless I've got a front pocket on my shirt
• sometimes also joint rolling stuff
• keys
• wallet
• usually headphones

Idk if this much detail was wanted but here you go lol