I have the perfect recommendation: The Web Design WOW! Book by Jack Davis - the same guy who helped make the Photoshop 5/5.5 WOW! Book. You can use the link below for more information as well as links to some other design books...
Angel.....As menace asked for inspiration and "theory" I thought he might find some of the books useful. In particular i found "Designing web usability: The practice of simplicity" by Jakob Nielson very useful.
As regards using a link to a page on my site that has book reviews specifically for webmasters that I thought Menace might find of interest then I apologise for any offence.
Ady no worries, you just have to be careful of linking to affilaite programs that earn you money as no advertising of any kind is allowed int he forums. As to Jakob Nielsen's book, I do have it and find it quite useful, although a lot of what he says he has rambled on about before in other publications.