The ROI Ledger · 29 guides
Useful ideas, organized around real decisions.
Start with the core playbooks, browse by topic, or search for the decision in front of you. Every guide is built to leave you with a concrete next move.
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Start with the reference shelf.
These are the durable guides that explain the Mr ROI method before the category-specific rabbit holes.
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Principles
The Mr ROI operating system: the exact order I would optimize a life
Deals
My online buying system: verify the sale before you buy the product
Health
The fitness 80/20: the four-day system I can keep running
Work
The white-collar job playbook I wish I had before 4,000 applications
Money
The exit price: what new, open-box, refurbished, and used really cost
Home + Audio
The subwoofer ladder: what actually earns the money from entry level to insane
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1 guide
