The time I couldn't get in touch with a friend, for instance, so I consulted the cards and drew The Moon (needless worry) and the Four of Wands (a celebration). She was at a festival that day, and couldn't get to her phone. Or this weekend, when my computer was being an absolute delight, and I hadn't heard from my tech support forum of choice for hours. The Magician told me I had the tools I needed to tackle it myself, and while I didn't fix everything, I did manage to get my Internet back online.
Of course, it's probably not always going to be effective if you rely on a deck of cards to tell you what to have for dinner tonight. But it makes for an interesting way to flex your reading muscles. Part of being an effective reader, after all, is letting your intuition stretch you just beyond the classic meanings of the cards into a new mode of thinking. (How would you use the cards to decide what's for dinner? Six of Cups means a favorite childhood meal? The Tower means something spicy with bold flavors?)
It's not good to let Tarot do all your thinking for you, of course, and it's an easy trap to start relying on it too much. Ultimately everything should rely on your own decisions and common sense. But give the Tarot a spin for an unusual question sometime, and see what muscles it flexes in your mind. It just might surprise you.