In Medieval times, young men and women were matched with their Valentines by drawing names from a bowl. This is a direct link with the pagan Lupercalia fertility celebrations of 14 February . Their Valentines name were worn on their sleeve sleeves .similar to the Valentines Day tradition in Ireland of the exchange of Claddagh love rings. 

Several centuries ago , children used to dress up as adults on Valentines Day.  Similar to today's tradition of Christmas Carol Singing they went from home to home singing

Good morning to you, valentine;
Curl your locks as I do mine---
Two before and three behind.
Good morning to you, valentine.

From the 1750s the main tradition of St Valentines Day has been the sending of St Valentines Day cards & romantic notes along with Valentines Day gifts.

When a young European woman receives a Valentines Day Traditional gift of clothing it means a romantic declaration of intent ! Be my Valentine !

Wooden love spoons were a Valentines Day Tradition in Wales . These carved gifts with romantic hearts were once popular St Valentines Day gifts.

Modern day Valentines Day Traditions include Valentines Day Romantic breaks, St Valentines Day romantic dinners, Valentines Day trysts, Valentines Day Dating & St Valentines Day parties are all often initiated with a Valentines Day Card.

Other modern day Valentines Day Traditions include gifts of Valentines Day flowers, Valentines chocolates, St Valentines day Champagne, Valentines Day perfumes, St Valentines Day jewellery & Valentines Day hampers which are all accompanied by a Valentines Day Card .