There is much spiritual information that is revealed only when we are ready for it; the sense of discovering our own truth is part of progress.
Psychological / emotional perspective: Discovering the unexpected in dreams highlights information that is needed.
The symbolism of the object or the idea will be important. Discovering a jewel, for instance, suggests something that is precious from an emotional perspective.
Material aspects: When the correct method or information needed for carrying out a task on a work-a-day basis is not forthcoming it is possible that dreams will offer information that points us in the right direction and allows us to discover the answer.