• if the weather permits, spend as much time as possible outside before winter sets in.
• enjoy viewing autumn leaves.
• start mixing darker colours into your wardrobe like forest green, marone and checked patterns.
• go through your cardigans and embellish/alter some if you like.
• go on a walk through the park and collect pine cones, autumn leaves and dried flowers.
• display them in a shadow box. Try pressing leaves.
• now that it's getting cool enough to drink hot drinks again, re-organise your teas; make sure each one has its own pretty tin.
• get out your watercolours and paint the yellows, oranges and reds of autumn leaves.
• bake hot cross buns or other small treats.
• visit an orchard or pumpkin patch.
• dry rose petals and other flowers, collect dry spices and make them into potpourri, or put them in sachets for your drawers.
• start sewing a dress out of heavier fabric to be ready for winter.
• cook dishes with ingredients like apple, pumpkin and cinnamon.
• buy some socks on sale and experiment with layering them.
• break out your scarves! Experiment with different colours and textures. Try wearing 2 at once.
• watch Green Mansions, with Audrey Hepburn as a forest girl with a deer for a friend.
• cultivate a back-to-school look with a school blazer, nerdy glasses, braids and ribbon bow tie.
• go to the library and choose some seasonal books to read.
• sew a sleeping mask to prepare for the hibernation season!
• do something Harry Potter-themed, like dress in school colours or try one of the recipes. Start re-reading the books.
• use a fountain pen; practice your calligraphy. Try making a feather quill.
• clean the house with herbal washes and refresh the bedding.

from Fern & Fawn and here, and Hedgefairy, and Kathrynand my own ideas