The single most important thing is that the customer gets taken care of properly, without any feeling of the inner working of the company.

I am adamant about client remaining with their person of choice (this has cost me money in the past, but its the right thing to do for the company).

That being said, ANY pay plan that is worth a poop, will have a small percentage of the total shop sales earnings split amongst all the sales people.

This gives everybody motivation to help one another and greatly improves moral within the troops.