Puzzle

To dream of a jigsaw puzzle implies the presence of real life mental challenges and problems, which you wish to quickly resolve.

To dream that you are missing some puzzle pieces suggests unavailability of all necessary considerations and facts to help you arrive at a wise decision.

To see or do a crossword puzzle embodies a mental challenge you are currently facing. The dream may be a take on 'crosswords' and may either evoke a need to make decisions.