There is a certain careful school of thought regarding promises. It takes somewhat the same tack as that advised by the old man who bade his interrogator ask him no questions lest he hear lies. Its adherents are the people who RSVP "maybe" on Facebook (guilty! guilty! I am guilty!).
Of course, being also the sort of person "who never promiseth but he means to pay" (or, at any rate, wishing to be that person) I have found it most useful to promise things firmly. Then I have no choice but to go through with them. Be ye all witnesses, therefore, that I am hereby promising to have a post Thursday, Friday, or Saturday about the Presidential Debate.
There now. Cross my heart.