Please reply with any good resources you know of - and enjoy these!
(I'm not associated with any of these sites)

stock.xchng - the leading free stock photography site - Free Stock images. Highly recommended.

Incompetech - free, royalty free music.

Ghost Notes - Music, member of this forum. Top notch stuff.

Royalty Free Music, Free Sound Effects, Free Music Loops - Public domain sound effects.

Stock Footage & Video Backgrounds from A Luna Blue - A Luna Blue Footage: Sign up for the newsletter, get a free download each month.

Detonation Films - Footage: Free explosions, muzzle flare, etc.

Internet Archive: Moving Image Archive - Internet Archive Footage: Awesome resource. Many, many public domain videos, many at larger resolutions. Try a search for "Stock" to access hundreds of royalty free clips. Bookmark it now, seriously.

Free Royalty Free Stock Footage Clips - Footage Firm Stock Footage: Offers multiple free high quality clips. If you haven't already downloaded these, I highly recommend adding them to your library.

Artbeats - Royalty Free Stock Footage For the Video Professional - Artbeats Footage: Register for the newsletter, get a free clip. Order their free demo reel while you're there - it's really enjoyable and includes tutorials.

EDIT: titles and clarity.