I practice different modalities other than the Tarot, such as Reiki, IChing, runes, dowsing and a bit of palmistry. I love to use oracle cards and buy various Tarot decks during the year. This keeps my practice fresh and offers a new perspective.
When students ask about including other modalities in their practice, I say go for it! Anything that helps with self-knowledge will benefit your client. If you start to feel bored, try something else that matches your energy at this point in time.