Yup, I already told you. But let's talk a bit more. There are few things more intimidating than a blank canvas. That is true whether your canvas is a screen, a page, a paper, or... a canvas. The tools above have been incredibly helpful to me in the past. They are all free to "use", though GraphicRiver.net and ThemeForest.net sell tons of stuff with prices as low as $5 and usually not higher than $89 (I think).
If you take nothing else away from this article: think about how your client thinks about your services. Seriously. If I asked you to describe what you do, and then I asked your clients to describe what you do, would they say the same thing?