The easiest way to create a good social following is by having fresh content. Post regularly. In terms of planning, its easiest to create a year-long social posting calendar. Map out key holidays or events that are important to your cause such as October being substance abuse awareness month for the Know Your Script campaign or National Stop Smoking Day for the Way to Quit campaign. National suicide prevention week. Mark those days each year and post on them! Fill in other days, weeks, or months you need posts with educational messages, encouragement, or ways to get to know your community and engage with them.
If you need help with social posting contact your lead creative agency.