At the moment I am doing three collections per month. I look for sets or items fitting into my monthly concepts. Because each month there are the same three categories but each time with a different theme depending on the month/time of the year.
Contains fashion, but sometimes also home sets or items that are related to seasonal themes like fall, Christmas etc
fashion sets/items displaying a specific style in fashion, specific items of clothing or accessories
home, fashion or art sets that deliver a specific feeling, which I associate with the month during which the collection is published