There are a million combinations but recently I did one with sugar and coconut oil. Amazing! I didn't even have to moisturize after I got out of the shower. :) My skin felt so good and it has been so dry this winter.
You can always add peppermint oil (or any scent) if you want. My skin is too sensitive for that stuff so I don't.
There a bunch of other additives you can add but I personally don't think it is necessary. Keep the scrub more simple since you are washing it off anyway and then make sure your body lotion/cream/oil (whatever) is really good.