Hey Mr. DJ is a great example of branding. Rich's business card looks like this.
If you use his card to locate his website it looks like this.
His blog looks like this.
Whether your company is large or small the same principles apply. Colors, shapes, images and fonts can all help to create a branded look. It's repeating them in some way to help the viewer recognize that your company has a distinctive look.
So if your business card was designed 10 years ago and has one look, and your website was designed 4 years ago and looks different then your website and you just started a blog a month ago and it doesn't look like either? You're missing out on an opportunity to make an impression, an opportunity to make your company visually memorable.
My business card looks like this.
The Flirty Guide website.
And the blog.
The ultimate would be to have a flirty car. Maybe someday :)