One of the things I truly admire about Google's management approach is that, like the rest of Google, its HR leaders look at real-world data to engineer the company's people practices and guide their decisions.

Is it any wonder, as odd and counterintuitive as some of Google's practices may be to the outside world, it's been ranked the No. 1 place to work for the eighth time in 11 years?

Laszlo Bock, Google's former HR boss, has shared extensively in book form and various media outlets about Google's leadership and people practices. Here are my favorites that stand out:

1. Be consistent, not all over the place

Ever worked for a management team in which "the right hand doesn't know what the left hand is doing?" Perhaps they show favoritism, change strategic direction every few days, or don't have a clear vision.

Well, Google found that when leaders are consistent and fair in making decisions, and there's an element of predictability, people experience way more freedom, which leads to a great employee experience.

The reason, says Bock, is that employees know that within certain parameters, they can do whatever they want. If a manager is all over the map, employees can't get a reading on what they can and cannot do. This ends in a very restrictive, and frustrating, experience for most.

2. Have a moral, not a business, mission

Google's mission is the first cornerstone of its culture: "To organize the world's information and make it universally accessible and useful." What's distinctive about it, in comparison with other mission statements, is that there's no mention of profit, market, shareholders, or users. You don't see why this is the company's mission, or to what end it pursues its goals.

According to Bock, "This kind of mission gives individuals' work meaning, because it is a moral rather than a business goal."

Bock references history, adding, "The most powerful movements in history have had moral motivations, whether they were quests for independence or equal rights."

This is attractive to talent looking for work that is both aspiring and inspiring. And nothing is more powerful than knowing that your work is making a positive difference in the world. Google's "moral mission" provides that platform for work that matters.

3. Share everything

At Google, transparency is the second cornerstone of the culture. As an example, a newly hired software engineer gets access to almost all of Google's code on the first day. Employees have access to product road maps, launch plans, weekly status reports, and employee and team quarterly goals, and everyone can see what everyone else is working on. Employees share everything because they trust one another to keep the information confidential.

The ultimate benefit from so much openness is profoundly scary for traditional, command-and-control hierarchies that obscure information across teams. That is: Everyone at Google knows what's going on. This sharing of information fosters a healthy team spirit, which reduces competing agendas, backstabbing, and politicking. Bock says this practice "allows everyone to understand the differences in goals across different groups, avoiding internal rivalry."

He succinctly frames the argument for an open culture like this: "If you're an organization that says 'Our people are our greatest asset' (as most do), and you mean it, you must default to open. Otherwise, you're lying to your people and to yourself." He adds, "You're saying people matter but treating them like they don't."

4. Give employees a real say in how the company is run

At Google, "voice" is the third cornerstone of its culture. It means having the belief that the people you hired are inherently good and trustworthy, so you allow their input on decisions. Terrifying for most companies, yes, but at Google, many of its people practices actually originated with its employees.

In 2009, "Googlers" (as their employees are affectionately known) complained about how it was becoming harder to get work done because of the company's explosive growth. And Google's executive team acknowledged that they were right. As Bock tells it, Google's CFO decided to put the power in Gogglers' hands by launching "Bureaucracy Busters," a program in which Googlers identify their biggest frustrations and help fix them. This drastically boosted morale, as Googlers organized to improve systems and processes and make things better.

5. When hiring, high GPAs and test scores don't matter

Relying heavily on data crunching, Bock told The New York Times a few years back that GPAs and test scores are worthless as a criteria for hiring, unless you're an entry-level grad. Google found that they don't predict anything.

As Bock tells the Times, "After two or three years, your ability to perform at Google is completely unrelated to how you performed when you were in school, because the skills you required in college are very different. You're also fundamentally a different person. You learn and grow; you think about things differently."

Consequently, it's not uncommon to find 14 percent of some Google teams are people who've never attended college.