Though the holiday for which this almost-punctuationless sign was made has past, the point is as image finder Editorial Assistant Charlotte Jusinski says: "The joys of punctuation are relevant even after the holidays." The helpful/alarming message from Smith's:

Dont forget your sweetheart makes a great gift.

For today's exercise, we will experiment with punctuation—any at all—to make this sentence better (Eyedropper's "better"). Let's try on for size the following:

Dont forget, your sweetheart makes a great gift.

You have a darling sweetheart. Don't let your friends lack the same: Give them your sweetheart! Consent optional!