Decide your goal: closest flavor (match sweet-salty balance) vs. strict dietary needs (soy-free/gluten-free).
Swap by the table ratio (use less of thicker/sweeter sauces like teriyaki: start at ¾).
Adjust sweetness and salt: add a small pinch of salt for blandness or ½ teaspoon sweetener per serving for missing caramel notes.
If using vinegar-based swaps, thin with a splash of water and simmer briefly so the sauce coats food instead of tasting sharp.
Taste at two points: first while simmering, then after 5 minutes of coating/standing before serving or finishing baking.