If you think of her often, ideas will occur to you, many of which will take little time, expense or effort to express. She will wolf that horrible garbage down like it was gourmet fare. There is actually a certain romantic value in being a lousy but loving cook. Nothing you could do with the ragged lid of a coffee can could hurt your wife's enemy as much. It's even more satisfying because said enemy usually thinks you're a slow-witted Neanderthal.
Gallantry still has value in romantic relationships.
I'm opposed to greeting cards, which are a cheesy way out. Take a pen, and write your own feelings. There is nothing more masculine than a masculinity so unassailably confident that it can feel . You can't lose. Ignore all protestations, pleas, statements that it'll get cold, etc.