Since Valentine's Day is here I decided to make my own cards (This is not a graphics tutorial, this is and idea for you if you wanted to make your cards). As you can see in my design I took the liberty to advertise.

I also decided to put the names of my class mates on their envelopes and my logo for advertisement.

Next print your cards and envelopes then, use a trimmer to cut the cards out.

Know you have your one custom Valentine's Day (or any holiday) cards.