Tip #3
Just because you forgot V-day doesn't mean you can't go on Amazon.com to order her something and have it delivered. Just print out a picture of what you bought and say it is in the mail. You can't control what the post office does. You'll be a saint and you can blame Uncle Sam for the screw-up. Win-Win.
This is actually kinda my go-to. She knows I ordered it yesterday but doesn't care cause she is getting something she wants. Then I do something nice for her (I cleaned the apartment today) and get her a bottle of nice wine.