How I create Dramatic Black and White images for Instagram

From the comments:

A few of you have jumped on and pointed out that if you shoot in RAW, even if you are shooting BW you will retain all the colour info. Of course you're right, and I hope these tips help you. I think the question came from an Instagrammer who is likely shooting in jpg, so the answer is geared towards those who don't shoot RAW for Instagram. I'm actually one of them. I only have a 16GB iPhone which always seems to be too full, so shooting and editing jpg from my X100 is a workflow which works well for me. RAW is saved for my professional work. Sean Tucker

 I actually really like the idea of shooting exclusively in JPG for one's personal work or just walk-around photography. It inches the experience a bit closer to shooting film and forces the photographer to shoot with more intention. I know that I have been guilty of shooting things a bit "hurried" because I know I have a stop or two of flexibility in post with my raw files -  as long as I'm not clipping my highlights, I can make this photo as dramatic as I want. Speaking of which, after having watched your "Highlights" video, I've really enjoyed shooting FOR the highlights. May sound silly to others, but I've had fun, exposing for the highlight tone that I want and letting the shadows do what they may, and making now adjustment to them in post. It feels more natural to me. Again, just for my walk-around stuff. Anyway, love your stuff!! - Ryan Hamilton