A phone in the right light beats an expensive camera in the wrong one, every time.
Chase the first and last hour of daylight and skip the flat midday sun altogether; the golden hour does most of the work a camera body never can. If a shot looks dull at noon, it usually is dull at noon — come back at six.
Clean the lens with your shirt before every session; a smudge of pocket lint is the single most common reason a phone photo looks soft. Then get close, get low, or get high — the difference between a snapshot and a photograph is almost always the angle, not the gear.
Shoot the food, the hands, the doorway, not just the wide view everyone else is taking of the same monument. Those small, specific frames are the ones you will actually want to look at again — the landmark shot you can always buy as a postcard.