Actually, I like to do them in alphabetical order. That way I’m not doing the same type of letter, one after another.
And I have to mention: I originally saved today’s letters as Word documents, forgetting that they need to be PDFs. Needless to say, in re-saving them, I accidentally completely deleted one!
Thank goodness I printed up a copy before doing so. Otherwise it would have been a 19th letter. I just had to re-type.