Preferential Scheduling is the method I employ when I have to select a client for a particular appointment time slot, when that time slot is desired by more than one client.
The Table of Preferential Scheduling (below) allows Potential Clients to see the qualities I look for in a client in regards to scheduling.
Two Potential Clients contact me for appointments within minutes of each other.
Client #1: Wants to see me on Tuesday at 7pm at his hotel on the West Side.
Client #2: Wants to see me Tuesday Night at 7pm at his Private Residence in Tempe (The East Valley).
After a quick review of the table below, it should be clear that I will opt to schedule Client #2 before Client #1.