Currently, my own preparatory work for the Summmer Solstice Celebration includes:
Cleaning cattails our of the north end of the pond.
Weeding, mowing, and cleaning up around the teahouse by the pond.
Weeding, cleaning, and painting in the Sacred Circle Garden.
Cutting and stacking firewood for nighttime fires.
Daily work with Tarot Magick.
Reading two books by John Matthews and Anna Franklin that I have found useful in preparing for the Summer Solstice Celebration:
Celebrating the Seasons of Life: Beltane to Mabon by Ashleen O'Gaea
Midsummer: Magical Celebrations of the Summer Solstice by Anna Franklin
Lammas: Celebrating the Fruits of the First Harvest by Anna Franklin