Mix 5 parts crappy coffee with 1 part hot water. Add packet of no sugar added hot chocolate, 1-2 yellow sweetener packets (or blue if office doesn't have yellow. If office only has pink, fire up the resume) . Stir. Add milk (or milk substitute if you've forgotten to bring in your own milk). Voila! Free or nearly free mocha. Bonus points for shaking your milk and spooning in the foam.