My club's style is Shin Shin Toitsu Aikido (Ki Society), so we have more of an emphasis on the Ki side of things. I've been trying to emphasize things in my teaching like blending with uke's Ki and entering when his Ki moves etc etc.
Thanks again for all the great responses, and please keep them coming, as I need some more ideas!
I would reiterate getting the book Ki in Aikido
. It is absolutely full of exercises that hinge Ki Society training, including the one Rob mentioned.
Best of Luck,