I've discovered that I'm good at herding flies.

I start by turning off lights sources including the TV, and closing all the doors and curtains except for one open window which is now the brightest, and therefore most attractive destination for the fly.

Then I just stand so that the fly is between me and the window. I wave my arms out sideways, kind of like semaphore, and it discourages the fly from flying towards my body and my hands, and can only avoid me by flying in the direction of the window.

It doesn't work at night since turning the lights off means I can't see the fly, and with the light on, it just flies to the light, lol.

They also don't like wind, so if there is a breeze outside, I make a stronger breeze inside by swinging a towel like a helicopter blade, and it makes the entire room very undesirable for the fly.

When I was a kid I would just wait until the fly was bouncing itself against the window, and just catch it in my hand, then throw it out and open window.

It also helps if you keep your house free of stale or rotting food smells.

This skill has dramatically reduced the number of flies I've killed by swatting.