How to Make Cold Brew

Recommendations

Coffee Sock
Toddy system for home use - Great system if you have the counter space and don't mind buying extra filters.
Toddy commercial model - This is what almost all craft coffee shops use to make their cold brew.

*** If you have a french press, you can also use it to make cold brew concentrate. Just scale down the measurements in this video. Step it for 24 hrs then run it through a coffee paper filter. The drawback is that the yield will be very low.