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For coding interviews: (1) always think out loud by explaining your thoughts to the interviewer, especially when stuck or unsure. (2) make sure the interviewer understands your idea before diving into implementation. (3) write code in a top-down fashion, which means you can make calls to non-existent functions and fill in the details later, to maximize the chance of completing the main scaffolding.
For behavioral interviews: (1) study and practice the STAR framework (2) think about and list out as many past projects/experiences as possible (3) be honest.
To stand out: pretend the interviewer is your colleague, demonstrate 'Googleyness', and prepare questions to ask.