You have by mistake deleted some posts or links, etc., or you may even have messed up your template, and you need to recover from the mistake urgently. What do you do?
This is what you can do. Do a search (Google, Yahoo, etc.) for some terms in your past post and see if it turned up some cached copies of your post.
This is advice I could have used in the beginning of my webloging days. An excellent post by Peter! I think I am going to add him to the sidebar underneath "Weblog Wisdom."