Here are some great tips for your fall flowers....specifically sunflowers... Take 5-10 sunflowers and cut them all at different heights and put them in a very high vase - at least 16 inch high. Don't cut them at the same length because it will look weird. Make sure the vase is a heavy and robust vase so that the weight of the flowers don't tip over the vase.
One great vase idea is an old fashion milk bottle. And add a couple of empty bottles on the side of the flower display - it gives it that warm country feel. An earthy tone table cloth goes very nice with this flower display...it enhances the fresh yellow fallish tone. The best part is you don't even need to get filler flowers or greenery with sunfluers. But if you have some black-eyed susans in your back yard you can add them - they give it a nice touch. A nice place for this is in the kitchen.