Hands down my new favorite is ffmpeg video converter plugin for wordpress. It works like a champion for me.
http://wordpress.org/extend/plugins/...ail-generator/
It saves me a ton of time encoding videos right into word press without having to waste time doing it on my desktop. Now, I can use word press for everything from a tube style site to my members area.
W3 Total Cache is a staple too for those with busy sites.
