During my stint in television, I did a few one-man band live-shots. Most of them had screw-ups; two in particular were on-air disasters. Then again, now that I think about it, probably half of the two-man band live-shots at that shop ended up having snafus.
For one-man reports, I first had to drive the microwave truck to the site, turn on all the equipment including sending the tower up cautiously trying to avoid power lines. How I set up my on-air shot was by taking the light stand and cranking the light itself up in front of the camera to my approximate height. Would check the camera to see if the light was centered (and focused) in the shot. If not, it was adjusted accordingly. Mind you, all of this was usually done in a hurry thus increasing the possibility for mistakes, miscues, unfortunate circumstances, what have you.
I can look back now on those days in television with humor, even the night the bottom of my dress shirt was sticking through my unzipped fly.