
Mine has an auto open/close feature, so I hold it retracted by the pommel by my leg. If I think its likely to rain, or I'm indoors and can see the rain, I'll make sure the the wrap is unhooked.
The auto-close is good when rushing into a building or bus, but it does come with the downside of needing to "Reload" the auto-open half.
over the shoulder has a certain carefree panache to it, and also makes using it a cinch.
Mine is quite short (with auto open) and has a curved handle so I hold it reversed against my arm like a tonfa.