The official Academy hashtags are:
#wip - Use to show what you are working on today
#win - Use when you have any breakthrough, shows, sales or success
#feedback - Use to show that you are open to receiving feedback from the community
#meetup - Use when you are planning an Art2Life meetup
#materials - Use for questions about gels, paints, brushes, etc.
#inspired - Use to share anything inspirational