How to block both a coupon and discount from both being used

[efficiondave]

I know you can set it up so you can't use two coupons for an order, but we need a way to stop the combination of coupons and other discounts as well.

Example, if people use the buy 3, get 1 free volume discount, we don't want them to also be able to get free shipping for orders over $100.

In the terms, we say, "can't be combined with other discounts" but AbleCommerce doesn't seem to have an easy way to enforce that.