Use a dish drain from the dollar store to organize plastic lids. Use a dish drainer to organize pot lids, or Tupperware lids in a cabinet. You can find them in all sizes now, to fit almost any cabinet, and they are super cheap at the dollar store!
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.