A)  A model’s clothes provide warmth, comfort, and (for many
people) a feeling of security, between poses, and provide
accents during poses.  An ankle-length robe can often be
useful for all these purposes, and can be useful as a rug,
if the floor is too chilly, or too rough.  Bring slippers,
too: tacks are a constant danger.

B)  Large hats, a staff, large or small balls, a scarf, sports
equipment, a book, or tools can give artists and models
fresh ideas for poses.  It is a good idea to bring one or
two such items to each session.