I found that layering on a stamped doily image was a fast and easy way to make a simply elegant card. Keep in mind the colours that will work well with kraft cardstock, particularly when choosing a colour to stamp your sentiment, so it is easily read.
Stamps: image (Magenta), sentiment (Stampin' Up)
Paper: kraft cardstock (Bazzill)
Inks: white (Colorbox Frost), black (Versafine Black Onyx)
Accessories: flowers (Petaloo), button (Doodlebug), embroidery thread (stash)