Looking for Tips and Ideas to Give My Blog a Facelift

I’m a content guy, plain and simple.  I don’t like to fiddle around too much with the design aspects of a website or blog.   But since this is my personal blog, I would love to actually personalize it.  So I’m using WordPress as my end-user platform.  What are some software tools (for Mac mainly) or HTML/CSS resources I can look at to customize and improve the look at my current clunker right now?  And assume I’m a cheap beginner, even though I know a little bit of Photoshop, Dreamweaver, and HTML.