Well, I have made him wear bondage (e.g. collars and cuffs) as well as making him wear my underwear outside.
In private I have made him lick his own cum off my hand and just have him walk around in my underwear too as well as making him wear my stilettos (he really struggles to walk in them lol).

When I am not directly trying to humiliate him he is tied to the bed just wearing his hood. Other punishments are just whipping his body, he gets some very nice brusies and other times I fuck him with a strap-on.

I am really struggling for ideas as I am very new to BDSM.