I love the idea of moodboard. And I love seeing other people's moodboards because it can be such an inspiration.
An old ELLE DECO UK article says, "At its simplest, a moodboard is a collection of pictures or things you like. It just helps you make sense of all the ideas floating through your head. The trick is not to over-think it. Let your intuition guide you and, as your board (of wall, or scrapbook, or vignette) takes form, so the unconscious threads that weave together your personal taste will come to the fore."