Well, that site Shel linked is pretty useful.
So if your want your own personal archive for when that site goes away, I introduce you to WinHTTrack.
HTTrack Website Copier - Offline Browser This is a handy tool that copies websites to your computer for your own archives and off-line use. I have a number of such webarchives on SD cards for use in my handheld PDA.
It won't whack all websites. Some of the database driven sites won't work. For example, you can't whack CI's site itself and it also failed on Lidia's Kitchen recipe section. But it's still something to have in your bag of tricks.
Phil