Left over coffee.Freeze it in an ice cube tray. Put in a blender with your favorite coffee creamer to make a frappuccino or use them as ice cubes in ice coffee. When it melts, ur coffee eont be watery. LOVE this idea and I don't even drink coffee!
Grow your own avocado plant DIY tutorial (i've done this several times--absolutely works; have one avacado plant about 4 feet tall & about 3 feet wide)