Cut out nice front section of old Christmas cards. Cut an A4 card in two using pinking sheers or special scissors for cutting interesting edges on card. Stick the section from old card using sticky pads to front of new card, green and red works well. Write a message on inside using gold pen. Packs of small envelopes can be purchased in bulk from stationary stores. You can also purchase small stickers for the back of your card and print your details eg:
Hand crafted by
Lesleymc
Very satisfying, cheap, look quite good and nice personal touch.