Rarely will clients call you outside of business hours. People are mostly courteous, after all. Nonetheless, always give your client your full and complete contact details.

Give them your office number, your mobile number, your home number, and your e-mail address. If you’re going on vacation, give them your hotel number and a fax number. All of this is standard operating procedure with many consulting giants. At the beginning of each client engagement, they provide you with a sheet listing full and complete contact details for every member of the team. It positions them as very professional and always available during an engagement period.

Trust me—clients call only if there’s a dire emergency. But the ...

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