I never owned a purse in my life. But I pretty much always carry a backpack with me to work or grocery shopping/anywhere I think I'll need to pick something up or carry something. Otherwise everything goes in my pocket. Funny enough, like others that usually includes keys, wallet, lip balm and a cellphone, plus often a little mini pack of kleenex or something since I often work outdoors in the winter. When I carry a backpack I often will throw my wallet back there, a book to read on break/on subway, work gloves, and sometimes an extra hat (in winter, alternate between toque and baseball hat), thermal shirt or extra jacket/shirt.