Single arm hammer preacher, single arm db preacher, preacher concentration curls, pinwheel curls (either dumbbell or rope attachment, I double it up in my hand for extra forearm work), spider curls. With Db movements I like to have to wrist facing up but slightly pointing in the direction pulling away from it. I'm soon to receive an award for most terrible description of exercise execution, ever. OK, imagine yourself seated on a preacher bench, dumbbell in hand. As you curl upwards, instead of pulling straight towards your face, I turn my wrist slightly so that the top of the movement for my right arm would put the dumbbell more so beside my right ear.
I'm sorry I smoke way too much fuckin weed in the morning