New toy
Just bought me an external flashlight; a Nikon Speedlight SB-900, which is Nikon's top model. It wasn't as expensive as that sounds, though, since this was their demo model that they got me a good discount on, on top of the already rather low prices that this shop offers; this made it cheaper than the list price of the SB-600, Nikon's second-best model.
I'm afraid it will take a while before I'll be able to fully understand its features, though. I did get a course at photography when I was about 13 years old, which did help me in picking up again how to work with an SLR camera when I bought it. But that course never included anything about using flashlights; and while I do understand how bouncing light off of walls and other things may sometimes help in getting the picture just right, I haven't actually ever done that. So I guess I'll be practicing a bit, now...
Yes, well, that will work, but will not always yield the best results. Sometimes indirect light is so much better, in which case you need to turn the flash head in the right direction. Working out when and how to do all that is the big challenge.
Of course setting the camera and flashlight to full automatic will get reasonable pictures, but that's not what I'm after.