For the bathrooms: Mason jar match holder. Cut out a piece of black sandpaper that is the same size as a mason jar lid. Glue the piece of sandpaper on the lid with hot glue. Fill mason jars with matches, close the lid and you are ready to go.
How To Remove Scratches From Leather Furniture -- use a soft cloth to rub olive oil into leather in circles (really rub it in! Then buff with a paper towel to remove oil residue on leather. A few weeks later it still looks awesome.
Hidden doors -- This company makes cabinets, bookshelves and anything you can think of that fits your existing doorjambs thus hiding the door (and also making use of the space) Not sure I like the idea of a 'gun cabinet' door.
Cover 5 gallon buckets with burlap and twine for a super awesome look! Interesting idea for those without garden space. Make sure you punch holes in the bottom for drainage. what a great idea for those ugly buckets
Build a patio/deck cooler stand. This patio cooler stand is made from cedar decking. to be exact. It holds a 48 quart Igloo cooler. The top is hinged, and the cooler cover is mounted within the top. Bottle opener, and cap catcher complete the case