starting here) I tried to pick up a few tips and adapt them to the way I shoot and mess with the results (referred to more formally as "the process"). In particular I switched the E-PL1 from sRGB to AdobeRGB. I know what I've read that there's little to no difference between the two, and that some colors (reds and blues interestingly) can get washed out converting from AdobeRGB. Whatever. I just know that I appear to be getting a better range of mid-tones, and in particular, I'm getting the black blacks I want and first saw in Ming Thein's review of the E-M5. My "process" is to do some slight desaturation of the highlights, tweak the sharpening, maybe do some trimming (like the 1:1 image in the middle), then finish processing in Silver Efex Pro 2. Now, more than ever, I'm either selecting underexpose or low key 1 to start and tweaking that as needed.
I've also gone back to using the M.Zuiko 17mm again. While the top was taken with the Panasonic 20mm, the last two were taken with the M.Zuiko 17mm. Call me stubborn, fickle, or worse. Under the right circumstances I love that little lens, especially on the E-PL1.