My usual kit includes a SXS, a shot shell belt carrying way more shells than I will ever need in one day, in a mix of shot sizes but mostly 7 1/2, my trusty Filson Uplands hunting coat (or a Barbour in rainy weather) both with game pockets (containing a couple of plastic shopping bags being reused to prevent bleed throughs), a pair of fingerless gloves, Randall Model 5 knife, Buck gamebird folder with gut hook for cleaning and cooling the birds ASAP, advanced Suunto compass, survival items like a lighter and matches, a power bar or two, special wool upland hunting, nylon fronted trousers stuffed with my usual EDC pants pocket contents which include a lot more survival items, and sometimes a handheld GPS unit which makes me lazy about navigation and more than a little unobservant as well.
EDIT: Forgot my blaze orange vest, which is so legally required in ON that I could probably be fined just for leaving it off the above list. Oh, and a ball cap or fur felt fedora, depending on the weather. Need to keep sun out of my eyes, and also brain needs to stay warm.