Sifting flour. Sautéing spices “to release the flavor” and then adding them to stew where they’ll simmer for an hour or more. Pretending “restaurant quality” is anything besides twice as much butter and salt as you’d dare use at home. “One tablespoon of olive oil” to brown absurd amounts of meat at high heat. Once you start recognizing recipe BS, you see it everywhere.
Sifting makes sense if you knead by hand - makes absorption easier. Toasting spices in a little oil - spices release flavor into the oil and your kitchen smells awesome. Meat also releases fat when browned. So it is kind of self sustaining.
Whether you dry-roast or toast in oil depends on what you're trying to achieve; if you want flavoured oil for something like a tadka, then you use oil. Dry roasting to season e.g. a curry produces different flavours. It's also harder; different spices burn at different speeds, so for example add cumin first and turmeric last. burnt turmeric is very bitter.