I thought I& already found the best example of a BILLY hack already —these built-ins from Gwen of Makerista, which we posted early last year. Then this project came to my attention, and I& made room in my heart for two loves instead of just one.
DIY Tree-Branch Coat Rack: Cut/collect some small-ish branches (during a walk in the woods or from pruning trees). Cut into desired sizes making sure the "back" of each piece is relatively smooth. Clean & seal them, Then.MAKE A COAT RACK!