Once a year we get the chance to let those we care about just how much we love them. There is no gesture that says "I love you" more than hand crafting something for your special someone.
It can be as simple as a handcrafted card or their favorite cookie in heart shape. Or maybe, if you are a little more daring, you can distill perfume from their favorite plant. Then again, if you can't settle for anything less than extravagance, you can always make them a giant inflatable heart-shaped love seat. There is a Valantines gift for any taste on Instructables.