The Lab – Blog
Practical articles for consequential decisions.
The NJL Design Lab blog publishes source-backed guides, models, and operating systems for financial independence, investing, real estate, family finance, AI, and the non-money side of life.
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View the seriesFamily and Financial Independence
View the seriesRetirement Drawdown
View the seriesAGI Household Resilience
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Life Systems
A Personal Operating System for the Non-Money Side of Life
A practical weekly system for reducing overhead, protecting your attention, and keeping the non-money side of life aligned.
Investing
Part 3: Advanced FI Planning: Roth Conversions, RMD Suppression, and the Tax Mechanics of Retirement
An advanced FI planning guide to Roth conversions, RMD pressure, account location, healthcare costs, Social Security timing, and estate-aware drawdown decisions.
Investing
Part 2: Sequential vs. Blended vs. Cyclical: Which Drawdown Strategy Fits?
A practical comparison of sequential, blended, and dynamic retirement drawdown strategies — and how taxes, healthcare, and RMD pressure change the answer.
Investing
Part 1: The Beginner’s Guide to Early Retirement Drawdown
A plain-English guide to turning FI assets into retirement income: account buckets, simple withdrawal order, sequence risk, and why drawdown needs a system.
Investing
Options Greeks 201: Delta, Theta, and IV Before You Sell Premium
A practical 201 guide to reading Delta, Theta, and IV before selling premium, with a 4-point pre-trade checklist.
Investing
Options Trading 101: What Beginners Need to Know Before Selling a Put
A beginner-friendly guide to selling puts, assignment, cash-secured puts, the wheel strategy, and covered calls — with clear examples, risk-first explanations, official references, and pre-trade checklists.
Real Estate
BRRRR vs. Turnkey: Control, Simplicity, and the Cost of Complexity
BRRRR and turnkey are not competing versions of the same strategy. They solve different problems, and the better fit depends on your time, capital, skill stack, and tolerance…
Wealth & FI
The Real Work in FI Is Not the Number. It’s the Control Loop.
Financial independence gets more durable when you stop treating FI as a static number and start treating it as a repeatable control loop that catches drift, protects optionality,…
Investing
What’s Actually Inside Your Index Fund? Why the Mix Matters More Than the Label
An index fund is a building block, not a full investing strategy. What matters more is the mix: what the fund holds, how it is weighted, and whether…
Wealth & FI
How to Stress-Test Your FI Number Before You Trust It
Your FI number can look precise while still being unreliable. Here is how to stress-test the assumptions underneath it — spending, withdrawal, and timing — before you trust…
Life Systems
The Post-FI Reset: Identity, Routines, and Community After Work Stops Running the Calendar
Most FI conversations stop at the number. How much do you need? When can you stop? How do you know it is enough? That part matters. But it…
Investing
The 4% Rule Revisited: Safe Withdrawal Rates for Modern FI
The 4% rule is the most cited number in the financial independence community. It is also the most misapplied. The original research was sound. The shorthand that emerged…