A quick pre-trip check that avoids surprises.
Speed limit units, phone use rules, and blood alcohol limits all vary by country, sometimes significantly from what you're used to at home. A quick search for your specific destination's driving rules, ideally from an official source, takes only a few minutes and avoids a costly misunderstanding.
Rules around right turns on red, headlight use during the day, and mandatory equipment also differ more than most travelers expect.