Many tarot readers consider their decks as important tools for their magical or spiritual work. As such, they treat them with respect and reverence. Often, they cleanse or charge their decks, dedicating them to specific purposes. This article but Joy Vernon is one of the best I've read on the subject.
Reading and Ceremony for Charging a Tarot Deck
http://www.llewellyn.com/journal/article/1329
Do you charge, dedicate, or cleanse your decks, and if so, how?