Over at Dagan Books, they are telling us about the:

6 Mistakes People Make In Their Cover Letters (FISH anthology edition)

When submitting a story to Dagan Books, authors often make one of several common errors, not in the story itself, but in the accompanying email. While these mistakes rarely mean an immediate rejection, they may affect the final decision if the story was already in danger of being rejected.

For the rest of the wisdom, go here.