A Real‑World Walkthrough
Imagine Alex, saving for retirement in a 401(k) and a taxable account. The plan offers ultra‑low‑cost mutual funds with automatic contributions, so Alex builds the core there. In taxable, Alex prefers tax‑efficient ETFs for international and factor tilts. The flowchart confirms account location, costs, and behavior alignment, then sets rebalancing thresholds and contribution cadence. By following the map, Alex avoids timing guesses, minimizes taxes, and channels energy into saving more, not endlessly revisiting product decisions.