If I had alot of time on my hands I would definitely spend more time learning and using CSS. It can be very satisfying when you design something good using CSS. However, as a webmaster for several blogs, I know how time consuming CSS can be. Therefore, I tend to put content before CSS.
Nevertheless, a few tweaks to your design can make a big difference to the uniqueness of your sites.
Here are some useful CSS tips. If you would like to add any other CSS resources, please add as a comment.
I particularly like:
the good thing about the pull quote is people read it
