What happens at deadlock. Two founders at 50/50 will one day disagree. The agreement says what happens next: a cooling-off period, a casting vote on defined matters, mediation, and a buy-out mechanism as the last resort.
Who can sell to whom. No transfer without consent, a right of first refusal for the others, and the tag-along and drag-along rights explained in the next column.
What happens when a founder leaves. Whether they must offer their shares, at what price, paid how and over what period. This is the clause that matters most and is settled least often.