Most of us have on-camera flashes that can be triggered to flash in daylight, not just automatically. Some of us have dedicated external flashes/strobes that can do this as well. But it seems as if, in these days of HDR and Extreme PS, balancing light outdoors with what used to be called "fill flash" is something of a lost art.
SO... Give it a try yourself, There are many tutorials available online.
This one is an extra Open Challenge for the week, just because it seems like a good idea :-)