You don't need to print coupons. The way my wife works this thing is by printing (black only) the list of coupons and store specials. The coupons are clipped from the Sunday newspapers or from coupons in the mail. The store specials are also sent in the mail or can be found in the paper. One of the best tricks from this is finding things that are on special and using coupons on top of that.
I'm sure there are other ways of using this, but that's the way she does it and it seems to be working very well.