I saw this online today and its got several exciting MOD REWRITE Rules I’ll use on a regular basis. Below, I’ll list some of the rules you can find on this excellent post, then give the link.
The author has MOD REWRITEs for basic redirect, remove www. from your URL, block an IP address, strip Query Strings, set a default image and more!
Go and read 10+ Mod_Rewrite Rules You Should Know.