FN buton set to switch to MF ( A curious thing is that if you switch to MF using the FN button, then switch the camera off it will still be in MF when you switch on. The problem is that the FN button won't allow you to switch back to AF, you have to use the AF button on the L/H shoulder. It didn't work like that on the 1st firmware but happened after the update IIRC.
Rear command Dial for Aperture In Aperture P and Manual, front Dial is then used for Exp Comp in Aperture P.
Front Dial for Shutter Speed in Shutter P and Manual, rear dial is for Exp Comp in Shutter P
The Direct Function Buttons are set to stay active for 8? seconds to avoid having to keep them pressed when changing settings via the command dials.
Shoot Raw.
Avoid ISO3200 if it's really dark due to banding (works ok if there's reasonable light but I need a fast shutter speed)I'd try IS and only use 3200 as an absolute last resort and I'd also convert ISO 3200 to jpeg using Olympus Master rather than Lightroom so that I can apply Noise reduction to the Raw file)
2 quick tips,
If you're revuing a shot and have zoomed in you can switch back instantly by pressing the FN button rather than scrolling back.
If want to zoom in on a particular area press the FN button before zooming in, a green rectangle will appear which can be moved around, pressing the FN button again instantly zooms to the selected area, you can then use the arrow buttons to view the next image zoomed in on the previously selected area. Press the FN button twice to return to the un zoomed image.
Pressing the focus area button at any magnification allows you to compare two shots.
That sounds very complicated but it's easy to do and hard to describe.
I can't think of anything else but the Dual Function buttons on the L/H shoulder are carp, I still can't get it right every time and I need to use the Meter and Mode buttons pretty often, I'd have preferred the WB button and Meter button to be swapped around as I don't change WB as often (always set to cloudy and shoot Raw. I don't set WB to auto even though I shoot Raw as I think it can lead to inconsistancy, could be wrong about that though)
I can't think of anything else, look forward to the feature and I hope you get some decent lenses to try, the 150 f/2 is nice, the 70-300 seems good at the price. If you can figure out what AF mode suits various subjects (1 point, 1 point dynamic or All Points/ static, moving/AF/S, AF/C etc) that would be a bonus as no one else seems to know for sure