This 100-day action plan outlines five phases of work: 1) Days 1-20 focus on understanding company culture, outlining commitment plans, and creating a yearly agenda with stakeholders. 2) Days 20-40 include meetings with internal teams and building a sales funnel. 3) Days 40-60 focus on executing the plan, formal meetings with clients, and engaging with prospects. 4) Days 60-80 involve full engagement with clients and teams on existing opportunities. 5) Days 80-100 work towards milestones.