Each time you crack an egg open, instead of tossing the shell into the trash, drop it into an open container that you keep in the fridge. When the container is full, crush the shells into small bits and sprinkle them around the base of your plants.
Self watering hanging basket. The link shows putting a small pot in center and filling with water but I like the water bottle idea shown in illustration.remember to line bottom with plastic bag (between the soil and fiber or moss) - Gardening For Life
How To DIY Aquaponics - The How To DIY Guide on Building Your Very Own Aquaponic System