Take a container, any container. Fill 1/3 of it with coffee grounds. Any coarseness will work. Fill the container the rest of the way with room temp water or cooler. Next put it in the fridge for 12-24 hours. The longer the stronger it will be.

Take a different container, and strainer with a coffee filter (or as many as you need depending on how much straining you will do) slowly pour the fluid into the filter. This can take any where from five minutes to forty five.

Now that you have your nectar of the gods, you can pour it over ice, mix it 1:1 in water, or milk. I like it with milk the best. I recommend you taste it first before adding sugar it won't be too bitter.