The way characters drop subtle hints in dialogue often gives away the plot twists before they happen. In 'The Last of Us Part II', Ellie's offhand comments about revenge foreshadowed the entire narrative arc. Paying attention to environmental storytelling helps too - notes left behind or background details can reveal so much.
When predicting, phrases like 'I bet this character will...' or 'This item must be important because...' work well. The key is backing up guesses with evidence from the game world. Over time, you develop an instinct for spotting Chekhov's guns - those seemingly insignificant elements that later become crucial.