Man, that is a broad question.
It would help if you narrow it down for us a little bit? Who is the Dom, who is the Sub, do you both switch?
That being said, I have always had a soft spot in my heart, (and a hard spot elsewhere) for standing up and chained with leather straps. Blindfolds are always fun, as are floggers.
Try things out and find out what works for you.
Have fun