Sam Gringlas

When it's closing time at Literati Bookstore in Ann Arbor, Michigan, co-owner Michael Gustafson runs through a checklist that, for the most part, is pretty routine. First, make sure all the customers have gone, lock the doors and take out the garbage and the recycling. Shelve any stray books, adjust the tables, turn off the music.

The night before one of the biggest rallies in Washington, D.C., history, Sam Zeif is beat.

It's been a long day. It started with an early-morning hit on CNN, then another with ABC's Good Morning America, followed by an afternoon trip to MSNBC — not for the first time. Just two days earlier, he was in Los Angeles, filming a segment with Ellen DeGeneres.

Wednesday is Valentine's Day, and if you struggled to find just the right words to tell a special someone how you feel, you have options.

There are the classic options: Store-bought superhero valentines or sappy Hallmark cards. Or if you're into something sweet — boxes of pastel-colored candy hearts, emblazoned with messages like "BE MINE," "XOXO" and "HOT STUFF."

But if those candy greetings feel tired, or just aren't striking the right note, Colorado researcher Janelle Shane has some ideas.