A couple tips:
Gmail Notifier http://toolbar.google.com/gmail-helper/notifier_mac.html
This firefox extension gives you folders (among other cool features): https://addons.mozilla.org/en-US/firefox/addon/6076
Gmail Notifier http://toolbar.google.com/gmail-helper/notifier_mac.html
This firefox extension gives you folders (among other cool features): https://addons.mozilla.org/en-US/firefox/addon/6076