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The eatery around the corner from me had a sandwhich board that read, "The best damn food in the neighborhood period." I thought that's redundant. You shouldn't write out the word period and then punctuate the sentence with a period. That's double sentence stoppage. Instead, I think you should put quotes around the punctuation so that the reader knows to say the punctuation. "The best damn food in the neigborhood '.' " Unless of course they mean period as in a segment of a hockey game. But that doesn't make much sense. Or a women's period, but that's just unappetizing. Or perhaps they meant in a period of time. Though, that's the kind of negative thinking that runs a business into the ground.