If you're not a designer yourself, but don't want your sites to look unprofessional,
it might be a good idea to use a minisite designer.
I have been looking around a bit, and here is the list of the ones I like:

http://www.pixelofgenius.com/
http://www.designgururyan.com/
http://www.minisitefrog.com/
http://blingcovers.com/
http://www.graphicsalien.com
http://www.graphicmavericks.com

These are also ok:
...

May 07, 2009 | By Albert Hallado In Make Money Blogging

You want your readers to take action to do whatever you want them to do like buy your product or services, go check out your affiliate links, signup on your squeeze page or just simply Comment on your blog.

Well you know I notice it’s....

Read More!
How To Motivate Your Blog Readers To Take Action!

Till Next Time and God Bless You!

Albert Hallado