Widgets in WordPress 2.8
I have presented you a very complete tutorial about widgets a few weeks ago, but here are a few others to help you manage your widgets easily:
A tutorial from Woothemes team, to teach you how to create your own WordPress widgets.
Jeff speaks about two WordPress widget plugins, that can help you to specify where and when widgets are displayed within your WordPress theme. If you are looking for such a plugin, go have a look at Widget Logic and Widget context plugin, they cboth can be really useful!
Manage your newsletters
Another simple but yet great newsletter plugin for WordPress.