A business use case

You are a sales representative for your company, XYZ Widgets, and have been sent to a conference to talk to potential customers. While at the conference, you have a great conversation with Brenda Mcclure, the CFO of Cardinal Inc. Brenda is interested in potentially purchasing 1,000 widgets for Cardinal and gives you her card. This is a hot lead! Let's see how you work this lead in Salesforce.