I can't take credit for this idea, but I have seen the light and thought I would share. FREEZE your LEFTOVER coffee. Seriously. Bust out those old icecube trays. I have a bazillion plastic trays from when I made my own baby food...(seriously, anybody need some?) and we use a French Coffee Press (yummo richalishious coffee goodness comes from here) and we nearly always have some left over coffee.
We froze the leftovers, and now, anytime I want some rich, non-watered down iced coffee, I just plop in my coffee cubes into my coffee and VIOLA...Ice cold, bold, good to the last drop iced coffee goodness.