For example, I need to figure out how to make the header area of a site I'm working on look nicer. The site title is currently a picture that the site owner drew, and it sucks. So I figured out how to properly fix it by making my site's title appear in a different font. You should now be seeing it in a font that looks kind of like a car name.
Now I need to develop a logo and a brand. I thought of taking the Drupal logo, making it yellow, and adding more spikes so it looks more like a porcupine.