Customize SharePoint Search Control style

http://www.thesug.org/blogs/kyles/Lists/Posts/ViewPost.aspx?ID=12

http://erikswenson.blogspot.com/2010/01/change-sharepoint-search-icon-with-just.html

Hover effects on HTML elements like <td> and <tr>

http://www.kavoir.com/2009/01/css-table-hover-effects-for-tr-and-td.html

CSS dropdown menu

https://www.servage.net/blog/2009/03/20/create-a-cool-css-based-drop-down-menu/

PSD to CSS

http://www.makeuseof.com/dir/psd2css/

http://www.psd2cssonline.com/

http://www.devwebpro.com/creating-css-layouts-the-best-tutorials-on-converting-psd-to-xhtml/

Choosing a Color Palette

http://colorschemedesigner.com/

http://www.colorsontheweb.com/colorwizard.asp

http://aviary.com/tools/toucan#

http://www.colorotate.org/

http://www.colorschemer.com/online.html?r=245&g=206&b=222&hex=f5cede

Create an overlay div on the page

http://answers.yahoo.com/question/index?qid=20090720220108AArFwM6

Using relative urls in stylesheets

The urls in the stylesheet are with reference to the css file

http://stackoverflow.com/questions/940451?sort=oldest#sort-top

Assign CSS on the basis of browser

<link type="text/css" rel="stylesheet" href="css/white-master.css" media="screen, projection" />
<link type="text/css" rel="stylesheet" href="css/jquery.jcarousel.css" media="screen, projection" />
<!--[if IE]>
<style>
#browser-controls li.txturl input
{
width: 340px; /*367 *..340/
/* height: 20px; */
height:24px;
padding:0px;
/* list-style: none; */
}
</style>
<![ENDIF]-->

you can also use the link tag instead of the inline style tag

Highlight current page link with CSS

http://www.hicksdesign.co.uk/journal/highlighting-current-page-with-css