Decide your use-case: spread/topping, melting into a sauce, or baking/folding into a dish.
Choose the closest match: gorgonzola dolce first; then stilton if you can soften it; reserve roquefort for bold flavor.
Use the listed ratio; if your substitute is firmer than dolcelatte, soften it by stirring with 1–2 teaspoons of milk/cream per portion.
Taste and balance: add a small pinch of salt only if the substitute feels mild; add lemon or a drop of vinegar if it tastes flat.
For sauces and warm dishes, add the substitute off-heat and stir until smooth to prevent graininess.