Decide your goal: closest naan chew and tang (yogurt-based), closest heat blistering (tortillas), or easiest quick swap (pita).
Use the table ratio (1:1 when possible). If the substitute is drier (rice cakes/bagel), plan to add moisture via covering, brushing, or a quick steam step.
Cook hot and fast: skillet toasting or brief oven warming to prevent toughness, then rest wrapped 30–60 seconds to stay pliable.
Add naan-style finishing: brush with ghee/butter and a pinch of garlic or sprinkle of herbs to match aroma and richness.
If serving with saucy curry, slightly under-toast the swap so it absorbs sauce instead of staying crusty.