Divination work can be carried out through many modalities other than shamanic journeying. Crystal gazing, tarot cards, runes, the I-Ching, and tealeaves are just a few of these. Some diviners use no method other than their own receptivity to psychic impression. No method is inherently more effective than another. The effectiveness of any method depends on the participation of the spirits in delivering information and the ability of the reader to receive and interpret it.
Most prediction operates on the principle of synchronicity: Since the entire universe is a single entity, any part of it is holistically connected to every other. In other words everything is in synch with everything else. Therefore, when a particular rune, or configuration of leaves is presented in a reading, or when a certain scenario is revealed in a shamanic journey, it naturally has relevance to whatever question is under scrutiny. It is the responsibility of the practitioner to find that relevance and make it clear to the seeker.
Diviners and practitioners need not limit themselves to one method or another. I, of course, most often journey shamanically when I am given a divinatory question for the spirits. However since my college days, I have been a reader of the tarot, and I still find consulting it to be an effective and rewarding way to receive information and guidance. If this method of divination appeals to you, please feel free to request it.