How do I set expiration on CSS, JS and Images?

Question

I have recently analysed my website with pagespeed addon on firebug. It suggested me to set expiration on CSS, JS and image files.

I am wondering, how do I do this?

Answer 1

Better one (found at http://www.paulund.co.uk/set-expire-headers-in-htaccess, but as 0 seconds didnt work, I've changed it to 1 seconds )

# These are pretty far-future expires headers
# They assume you control versioning with cachebusting query params like: