Everything communicates—everything you say and do, and everything you don't say and don't do. Furthermore, everything great leaders say and do flows directly from their own core values, beliefs, and intentions. They live their message. This is why your 100-Day Action Plan should be a subset of your overall communication plan and why you to need to think through what's really important to you, to the people you're communicating with, and what and how you want to communicate, before you say or do anything.
Since leadership is about inspiring and enabling others to do their absolute best together, in pursuit of a meaningful and rewarding shared purpose, the starting point for your communication plan should be that purpose. Your plan is about moving your target audience from its current reality toward that purpose. Think in terms of a campaign, driving a single-minded message over and over again in different ways over time.
The six basic steps of a communication campaign are:
Plan the campaign and key elements: message, signs and symbols, media, and ...