Find it, Make it, Love it: DIY Board and Batten-Master Bedroom. This is a great tutorial and would work for adding a picture ledge to an old door or window too. May work in the guest space with a ledge less panel covering the electrical panel.
DIY Frames for Wall Decor: Turn the simple frames from the local thrift store into these expensive frames by attaching wood to all sides and hang on wall. Low budget with high impact DIY project for your home decor!