Office space in an RV wheel under the bed. Could also build a fold/lift up perm wooden station so items don't have to be put up & down when you put the bed down. Maybe even on of those lift up coffee tables?
Basement bathroom door for cleaning supplies. Kitchen to basement door for pantry items. Back of girls' door for barbies. Inside girls' closet for shoes. Inside my closet door for belts and scarves. Entry door for shoes, mittens, etc.