Our preparation timelines for the Board, 4 Committees and an Advisory Council (all happen in the same week) are as follows:
6 weeks in advance the Executive Committee meets to review the agendas
5 weeks in advance we meet with the Board Chair and Committee chairs individually to review the agendas
3 weeks in advance, a first draft of the materials are due to the Board Secretary, then reviewed two days later by the whole Executive Committee
2 weeks in advance, the final draft is due, then reviewed (shorter meeting)
1 week in advance we release all complete materials via board portal
The first draft is the biggest struggle as far as meeting the deadlines, but it gets everything on the table and makes it easier to get to the final materials by surfacing any issues earlier. We try to keep briefing notes to 2 pages, then an attachment if needed.