I recently found a couple of great Fujifilm X100S videos on YouTube that are well worth watching.
The first is by David Hobby – well known as strobist and a big X100/X100S fan.
The second is an AF tips video. This one is from Dave Chueng and he points out a tip that I hadn’t found, one that I also don’t recall seeing in the manual whereby if you press and hold the Command Dial in MF mode it switches between the three different manual focus assist modes, which is just fantastic for those of us who use the MF/AFL ‘back-focus’ system.
David Hobby’s video is quite long, but I highly recommend you sit through it as he’s an expert on the X100S and really knows his stuff!