While some career counselors recommend making 15 to 20 calls a day, lower this amount if it seems overwhelming. Make calls when your energy is highest. If you know that you're more upbeat after lunch, save phone calls until then and use the morning for administrative tasks. Know what you want to say when calling. Develop a script that includes your key points and use it to make sure you mention important items.
Many introverts have difficulty making small talk.
By learning about your contacts and their companies, you can direct your conversations and make them more meaningful. Take time out to replenish yourself. Plan your schedule so that you have periods of solitude that allow you to recharge. For instance, don't schedule a full day's activities if you plan to network at an evening event. While you don't have to change yourself, you'll need to learn extroverted skills and behaviors to become a more effective job hunter.