BuddyPress.org

@pleasehelpmeplease
http://www.tutorial9.net/tutorials/web-tutorials/quick-easy-css-development-with-firebug/
Keep in mind that if your importing css from a parent theme you may have to add the !important declaration.

@pleasehelpmeplease

Try using the developer tools in Chrome, Safari or Internet Explorer, or use Firebug with Firefox, or Opera’s Dragonfly…