Something featuring applique.
Stitch your favorite memory.
Illustrate a dream you had.
Product or brand that you can't live without. Oreos anyone?
Halloween every day challenge.
Favorite childhood book.
Stitch something to give to a friend or family member.
Unfinished project challenge.
and my final suggestion I'd like to call the 'Liberace challenge' where you make something over the top gaudy-awesome... something with rhinestones, marabou, sequins.
That's all I've got for now. Coffee long worn off.