"Subscribe to [publication X]
My ears prick up. There is inspiration for your library everywhere. That's a tag line/slogan that a library could burgle and adapt...
Come to your library and you'll never miss an issue
Research at your library and you'll never miss an issue
Learn at your library and you'll never miss an issue
Ask at your library and you'll never miss an issue
lots of possibilities.
Fancy it up into a sign, and you've got free promo material (it could go on bookmarks, too) that Big Newspaper Company paid good dollars for from a smart advertising agency... and you borrowed for nix apart from being attentive
(or being on hold for longer than one would wish, if I take the half-empty glass view, which generally I don't!)
What have you seen in marketing/advertising that could be adapted to use in a library?
The happy life of teacher librarians: inspiration is everywhere (and sometimes, being on hold can be useful!)