How do you light someones face if you're a poor (money-wise) headshot photographer? With cheap lights!
You can literally light a headshot client with only one light if you need to. What kind of light do you have? A lamp? If so, no worries. Just take that lamp, position it to the side of the headshot client's face, and turn it on. Now, move it closer or farther away until the lighting is bright enough but even enough so that there is no harsh shadows on their face.
As soon as you do this, find something white, like a large white cardboard piece, and tape it to something or have someone hold it so it is next to the headshots client's face on the opposite side of the light. It should bounce the remaining light onto the other side of their face, thereby making your lighting look much better.
Now, once that is all set up, you can either be finished, or if you have a ceiling light, turn it on. It should light up the actors hair. This will make the headshot look very professional, and you can take some pictures as tests, and adjust the lights as needed.
If it all looks good, white balance the camera and start shooting!
I recommend a tripod using this technique because household lights tend not to be as bright as studio lights, and so you will want to avoid camera shake.
Headshots NYC - Cheap, Professional Headshots in New York City