Ok so the NEX-F3 has a very handy built in pop up flash. But you might find that the intensity of it might be a little too much for certain styles of pictures if you want that more edgy use of light and shadow contrast on still subjects. One solution is to obviously use a flash difusser/bounce diffuser which helps reduce the intensity of the flash in subduing it or bouncing it and using the ambient light created by it.

However I couldn't be bothered making a fiddly makeshift paper effort for it to eventually inevitably fall apart. Fortunately though I had another sort of solution that didn't really use a flash diffuser. The gap between the pop flash and the front edge of the flash hold compartment lip is just the perfect size to fit a standard sim card. Placing it there causes the flash spring mechanism to hold it in place and also hold the flash back to point the flash at an upward angle, this helps to defuse the flash into the room and/or bounce the flash light off any nearby surfaces back onto your subject. Obviously you need to use a bit of common sense here as regards to surface distances, and space size in relation to the flashes capability. But do it right and you can pull out some impressive results. You might need to do a bit of trial and error to figure out the distance thresholds for the best results for specific shutter speeds and ISO settings. But after a while it'll probably become second nature once you get to know how to use the specific hardware combo of camera, lens and flash used. 

As you can see from the picture I covered my discarded sim card in a black vinyl sticker cover so it doesn't look as stupid whilst using it. Apologies for the poor picture quality on the NEX-F3 body shot, the camera on the phone I have isn't too great.