"On Mayer's first day, she should be meeting with her direct staff and addressing the Yahoo troops," said Patrick Moorhead, an analyst with Moor Insights & Strategy. "She needs to get employees excited and provide some timetables for when her new team will execute to any new deliverables, like a new vision and strategy."

Yahoo announced late Monday that 37-year-old Mayer, a top-line executive at Google, as the company's CEO on Tuesday. She is 's third CEO in less than a year, and industry analysts agree she has a ahead of her.

Mayer herself on Monday that leading Yahoo won't be her only new job. She is pregnant and due in October.

"Mayer has a successful track record and reputation for being able to plan and execute to what end users want, which is exactly what Yahoo has lacked for so long," Moorhead said. "But Mayer has no experience as a CEO, and she needs to be aware of potential blind spots. Great product people don't always make great CEOs and she needs a plan to get a few, quick wins under her belt."

So what should be Mayer's biggest goals in her new job? Analysts agree there are a few specific goals that she needs to achieve.