So what does everyone use for storage and backup of their pictures so we don't lose our wonderful works of art?

I am about to run out of space on my 1TB drive and am looking to get a solution for backing up and storing my photos and am curious what everyone here uses.

Do you shoot RAW+JPG, then delete all the jpgs after the job is done and only save the RAWs for future access? Do you back up both? Do you use redundancy (ie RAID setup)?