Getting late here but when you use more than one light have them at different power settings.
So say have your main light at full power..have a fill light at maybe 1/2 or 1/4 power.

Or remember the "Inverse Square Law"

I think your saying what the hell is he on about :-)

It is this

"When a subject is illuminated by a source of light..if your double the distance of the light from the subject only 1/4 strength of the light will fall on the subject"

Yeah I was clever once.

Its a pretty technical term to say "if the power of the light cant be lowered...move the light further away" 

You can also use things like bits of card or curtains hung on something to stop light falling onto certain areas..think of what happens when you move a lamp shade on a table lamp and bits that were lit then go into shade.

You can do a lot of things without spending a fortune..unless you are very rich and cash is no object.

 Eddie