Valentine's gift for her: will she tell a friend about it on the 15th?

February 13, 9 p.m., the card aisle at the drugstore. Half the shelf is already empty, the heart-shaped boxes are stacked by the register, and you're holding two cards that say almost the same thing. You put one back. You pick it up again.

Here's the short answer if you're looking for a Valentine's gift for her: choose something tied to a thing she said, wanted or lived through with you. An experience she brought up, an object that holds a memory, a letter nobody else could write. Price matters less than you think. What matters is that she can tell you were listening.

One quick test before you pay: on February 15, will she tell someone what you gave her? A perfume grabbed in a panic rarely passes. Tickets to the show she mentioned once, back in November, usually do.

It helps to know the default so you can step around it. The National Retail Federation runs a Valentine's survey every January, a few weeks before the date. In the one that polled 7,791 adults, 83% of those planning to celebrate said they planned to buy a gift for a significant other. These are plans, not receipts, and the most common were candy (56%), flowers (41%), greeting cards (41%), an evening out (39%) and jewelry (25%).

None of those is wrong. They're just what she'll see in every other Instagram story that night. If you go with one of them, make it specific: her favorite chocolate from the shop she likes, not the box from the register; flowers she actually likes, with a note that only you could write.

Two studies are worth knowing before you spend.

In the first, Francis Flynn of Stanford and Gabrielle Adams surveyed recently engaged couples about engagement rings. The men consistently thought their fiancées appreciated the ring more the more it cost. The fiancées did not report appreciating pricier rings any more. In a second study about birthday gifts, recipients again didn't feel more appreciation for gifts that cost more. As Flynn put it, the thought counts more than the price tag.

In the second, Cindy Chan of the University of Toronto, with Cassie Mogilner, compared material gifts and experiential gifts across four studies. From the recipient's side, experiences did more to strengthen the relationship. Chan credits emotion: living through something moves people more than owning something. She adds a useful caveat. Objects work too when they carry that feeling, like a framed photo or jewelry engraved with a loving message.

In the first few months, there are two ways to get it wrong: too little reads as uninterested, too much reads as intense. The fix is to be specific instead of big.

• A paperback by the author she brought up, with a short inscription about the conversation where it came up.
• The restaurant she saved on her phone and showed you with a someday. Book it and tell her only the time.
• Two tickets to the comedy show, the gallery opening or the game that came up once. It's a gift and a date in one.
• Something small tied to an inside joke. Even a few weeks in, you have one or two.

Skip expensive jewelry, trips, and anything that forces her to match it. If this is your first Valentine's together, there's a full guide to a first Valentine's Day gift.

Now the enemy is the routine. You've done perfume, the bag, roses and dinner out, possibly in that order, possibly twice. What works is whatever takes you off the script.

• A first time for both of you. A class neither of you knows anything about: swing dancing, wheel throwing, bouldering, Thai cooking. Being bad at something together brings people closer.
• Fixing the thing she loves. The boots with the worn heel, her grandmother's watch that stopped, the bike that's been leaning on the porch since last spring.
• Going back to the start. The place you had your first date, with a letter about what you were thinking that night and never said.
• A night out with her friends, organized by you. The table booked, the bill handled, the two friends she keeps saying she never sees. You don't go, and that's the gift.

For ideas that work any time of year, see unique gifts for a girlfriend.

After marriage, a lot of things become ours: the house, the accounts, the calendar. A Valentine's gift for your wife has to be hers.

Often what's missing isn't an object. It's time with nothing on the list. A free afternoon you organize start to finish: kids covered, dinner handled, her errand moved. If she wants to spend it alone, great. If she wants to spend it with you, even better.

Other ideas for this stage:

• An album or a page with the photos only you have. Plenty of parents have a thousand photos of the kids and almost none of the two of them.
• A night out like when you were dating, outfits chosen, no talk about bills.
• A simple piece of jewelry engraved with a date: your first date, not your wedding, which already has a ring.

What isn't a gift: a skillet, a vacuum, a new iron. If the house needs one, buy it on a Tuesday.

Long distance changes the gift, because what she wants most is you in the room, and that doesn't ship. Plan a call on the 14th, send something that arrives on time, and let the physical gift follow whenever the mail allows. There are ten ideas for that in digital gifts for a boyfriend or girlfriend.

• Gifts that comment on her body. A scale, shapewear, gym clothes she didn't ask for. Even with good intentions, the message that lands is a different one.
• Gifts that are secretly for you. The console for both of us, the bourbon we can try together.
• Clothes in a guessed size. If you're not sure, get a gift card to her favorite store instead.
• The pre-made gift basket. She can tell when the only choice was the size of the basket.

If you're reading this on the evening of the 13th, breathe: there's a guide to the last-minute Valentine's Day gift. And if the gift is for him, the logic changes. That's in a Valentine's gift for him.

Every gift on this page gets better with a note. Three lines are enough: a memory with a place and a time, something you admire about her and have never said, and a plan for the next few months. If you want to write more, there's a guide on what to write in a love letter.

If the letter wants photos, and it usually does, Eternal Gift puts the two together: you build a page online with your photos, the letter, a song and stickers, and give it to her by link or as a QR code printed inside the card, alongside the gift.