The Lean Stack

Every tool started as a real fix for a real problem. One for onboarding, another when the first didn't cover a step, a third to connect the first two. Add them up over a year, and you're paying for software the way you used to pay for cable: a stack of subscriptions nobody has fully audited, half of them doing jobs the other half already do.

The Lean Stack is the small business owner's guide to choosing tools without the sprawl. It is not a ranked list of apps, because those lists go stale before they reach print. It is a decision method built to outlast every tool on the market: a minimal tool rule, four categories of systems every business needs regardless of which tools fill them, and a clear way to tell where AI legitimately replaces narrow software and where it doesn't.

Inside, you'll learn how to:

• Run a stack audit that lists every tool, what it does, and when anyone last used it
• Apply the minimal tool rule: the fewest tools that cover the map
• Sort every candidate into buy, skip, or wait, with a real trigger on every wait
• Give clients and projects, communication, money, and knowledge one home each
• Put any new tool through the integration test before you commit to it
• Consolidate the tools that no longer earn their place
• Use one AI subscription and a few simple automations to retire whole categories of narrow software
• Choose between AI tools without chasing every new release
• Run a 30-minute quarterly stack review, plan for vendor shutdowns and sudden changes, and keep the stack simple enough to train a new hire on

Every chapter ends with one concrete move, so you finish with a working lean stack you can explain on one page, not a reading list.

Book 3 of the Smarter Hacks Library, the closing title of the Foundation tier. It picks up the minimal tool rule from Out of Your Head (Book 1) and gives it the full treatment, and it sets up On Autopilot (Book 4), where the stack you've chosen starts running itself. A companion workbook carries every exercise in fill-in form.

The fewest tools that cover the map. Nothing more.