My favorite plugins
Well i mostly work with wordpress and there are loads of plugins that simplify my work
Some are
Autoblogger - get content from rss feeds and turn them into posts
XML Sitemap - to create a sitemap when a new post is created
PingPress FM - to bookmark your post url to more than 30 bookmarking sites via ping.fm service
Contact7 - to create a professional contact form in minutes.
WassUP - to give stats of visitors similar to google analytics from your wordpress adminpanel itself