When creating a new handmade card, always make at least 2 cards with the same supplies; paper, ink, stamps, colors, etc. This will give you 2 cards instead of one in about the same amount of time! This will create a stockpile of handmade cards to send/give when time doesn't allow for a handmade card to be made!
Just make sure that you put a sticky note on the similar card so that you do not send it to the same person again!! :-)