When you go to your "My Account" page you will see a Welcome Back and your name headline on the top section.
If you scroll down past the upcoming holidays and events you will see your "My Favorite" cards. When you like a card for any season or holiday, you can create this list here. This is very handy when you want to send something quickly.
At the top of the page is a text button "Sent Cards" that allows you to see the history of all the people you have sent cards to and the cards you have sent. In that way, you will not duplicate your sending year after year.