As a tarot reader, I practice with my decks every day--like working out a muscle. I work with my manifesting gift every day too. Sometimes I combine the two activities to create a spread that works exactly the way I wish my life to be.
This exercise is especially nice if you have more than one deck. Some decks, like those with very generic minor arcanas, are hard to read without memorization--but perfect for manifesting.
Do you want more money? Love? An adventure? Go through your deck face up and choose all the best cards that if they turned up in a reading would mean your dreams will come true. However, be sure to pick at least one card that reflects where you are now.
Next, arrange them in a spread. Place the card that represents where you are now in the "past" position and your best cards in the future. Tap each card three times to signal that you want this spread to become your reality.
If possible, leave this spread out for a few days. You can even take a picture of it to be your desktop or screensaver. Finally, you can light candles, put crystals on the best cards, or simply smile at it every day as you manifest your desires into the world!