Most have abandoned their rolodex and daily planner, but the replacements also have issues.
Create/Use a Web Based Contact Management and scheduling system for your meetings, phone conferences, to do lists, and calls.
It is amazing how many companies and organizations allow individuals to keep contact lists in their email application. These contacts are the property of the company/organization, NOT the individual. When a person leaves, those contacts lists are often lost.
Equally important is the incredible number of hours (which translates into thousands to tens of thousands of dollars annually) spent across the enterprise updating contact phone numbers, emails, etc. Not only are there islands of disparate information, the information is not available to the organization.
Concise Planning offers a central contact management system for the entire organization. A contact is input/maintained in one place that is accessible to all whenever from wherever.