Coffee cubes: Pour coffee into an ice cube tray and freeze. This is a great use for coffee that you don't use in the morning. The cubes are good for iced coffee drinks, milk, or just cooling down a cup of coffee without watering it down. A little coffee is also good for your iced tea. Try it in your cola drinks, if you're adventurous.
Lime and lemon aren't anything new, but add them to your juices or sodas. Heck, I don't know, try squeezing a lime wedge into your vanilla ice cream. Let us know if it's any good.
Other ideas?
