I think that the statement 'Think twice and post once' is great. But another factor is needed before posting.
the Blogger should proof read his or her statement as sometimes the auto speller can replace some of your words. I usually am a fast writer and don't like to reread my messages. Guess what?
I had so many arguments with my friends for some words that I din't intend to write!
one more factor. the Blogger would be better off to write his or her blog few days in advance, something that we don't usually do, but it is better to get used to.