The Halachas of Putting Items on and Taking Items off a 'Tree';
Putting a nice smelling ESROG into wrapping material, putting on perfume or cologne and then getting dressed, spraying air fresheners, and spraying one's hair...
floor Drain with Hinges or Handle, Shelf in a Bookcase with Hinges, and the Use of a High Riser or Sofa Bed on Shabbos;