Match the form: seeds/spice for savory and baking doughs; extracts for small-batch sweets where you can taste precisely.
Start with the listed ratio, then adjust: if your dish tastes less licorice-sweet, add a small pinch; if it tastes sharp/bitter, stop and dilute with more base.
For seeds/spices, grind briefly or steep in warm liquid before adding so flavor disperses instead of staying spotty.
Add extracts late (after simmering or after mixing) so the aroma doesn’t cook off and you can correct intensity by taste.
Taste at the stage your final texture is set (after thickening for sauces, after baking for batters) and re-balance with sweetness or salt if needed.