Your AI stack: a system, not a collection.
Most people accumulate AI tools like browser tabs — impulsively, with guilt. A stack is different: deliberate lanes, known costs, and a review rhythm. One evening of design replaces a year of subscription drift.
01 Lanes, not favorites
The question isn't "which AI is best" — it's "which AI owns which lane of MY week." Start from your actual work, not the tools: list your recurring AI-shaped jobs (drafting, research, documents, meetings, images, automation), then assign each ONE owner. Our which-AI-for-which-job lesson maps strengths; the comparisons (Claude vs ChatGPT, Copilot vs ChatGPT) settle the contested lanes. One owner per lane — relitigating the choice daily is the hidden tax.
02 The shapes stacks actually take
Each ~$20 seat costs about one hour of professional time monthly. So the audit question per tool is brutal and simple: did it save an hour this month? Track a month of actual usage before renewing anything — the calculator's on our cost page, and honest answers routinely cut stacks by a third.
03 Adding and dropping without churn
New tool discipline: it enters on a trial with a NAMED lane and a named incumbent to beat ("trying Gemini for research against Perplexity for two weeks"). Beats the incumbent → it takes the lane; doesn't → it goes, no guilt. And when a tool loses its lane — because another absorbed the job, which happens monthly in this market — cancel the same week. Stacks stay sharp through pruning, not accumulation.
04 Write it down
The whole system fits on an index card: lanes, owners, monthly total, review date. The card is what makes it a stack — and when someone asks "which AI should I use," you'll have the professionally honest answer: "for which lane?"
Write your card: your five AI-shaped job lanes, current owner of each, total monthly spend. Any lane with two owners or zero — that's this week's decision.
Run your numbers →This week's challenge
Design the stack on paper, then run the one-month audit: per tool, hours actually saved. Renew, reassign, or cancel on the evidence. Most people who do this honestly fund their whole remaining stack with what they stop wasting.