Strawberry Fields Forever

I think Valentine's Day merchandise has the highest post-holiday usage than merchandise from any other holiday. No one would wear a shirt with a Christmas tree or a pumpkin on any days other than Christmas or Halloween, but a shirt with a heart is generic enough that it can be worn on any day other than the two weeks after Valentine's Day (because it will look like you got it for 75% off).

Here's something you can do for the two weeks after Valentine's Day though. Take this cheesy heart shaped cosmetic bag:

Cut the hull part from green felt and seeds from beige felt. Glue them to the heart and you can use it on any day regardless of season.