There are witches who keep separate journals for dreams or include sections in their grimoires for this purpose. You can also record any experiences you’ve had while traveling the astral planes in your sleep/dreams. If the experience was noteworthy and magical, or feels important, or even if not, it can be worthwhile to note and document it. Dreams can help clue us in to emotions and problem areas, as well as areas where we could build confidence or other positive experiences more.