For agency owners: profitable retainers, clients that renew, and accounts that expand.
Reach for this when you run an agency on retainers and the margins, renewals, or expansions keep slipping. It installs the operating system: positioning that escapes the generalist trap, per-client economics that expose which retainers actually make money (and the fire-or-fix threshold for the ones that don't), a communication cadence that prevents surprise churn, the monthly report that renews retainers by leading with client outcomes, QBRs that expand accounts on schedule, and a save playbook for the at-risk clients your comms signals flag. One worked example - an 8-person marketing agency with 11 retainers - threads through every skill so the margin math composes.
Arranged in the author's recommended order. Walk through them in sequence, or open any one on its own.