Follow the HBA event planning standard operating procedure, which can be found below. HBA has created two separate SOPs, one for educational programs and one for networking events (since the scope of planning a networking event is often smaller). Each document also has separate sheets for if your event is sponsored or not.
Within each SOP, enter the event date (or tentative event date) and the names of your team members where indicated at the top of the sheet and the document will populate all of your target deadlines and action item owners. Save this document somewhere your team can access and update it as you work through the process.