The author uses Calendly to streamline scheduling and qualify leads for their business. They have found that creating shorter events for prospective clients, adding qualifying questions, not allowing people to book meetings within 24 hours, sharing their Calendly link on their website, and sending pricing information before the meeting can all help in qualifying leads and saving time. By using these features strategically, the author is able to filter out unqualified leads and focus on more productive conversations with potential clients, ultimately streamlining their scheduling process and improving their business operations.