Everyone experiences the ups and downs of life as they grow older. Perhaps you’ve been through some hard times recently, or maybe it’s been a while since you’ve felt any major lows. As we age, many things in our lives slow down or shift to a new stage that requires us to make adjustments.

You may have found yourself wondering what you could have done differently as an adult if you had the chance to redo your twenty’s all over again. Here are a few lesser-known secrets from top CEOs; things that they wish they had known when they were younger:

How to work with people better.

It’s no secret that people are important to the success of any business. And as we age, we usually find out that some people can be a lot harder to work with than others. Many execs believe that learning how to better work with people would have made things easier in the early days of their careers.

Having confidence to fail.

If you’ve ever lost, failed, or even been in a situation where you felt like you didn’t know what to do, it may have been difficult for you. The thing is, many top executives wish they had more confidence in failure as a younger adult. They wish they had embraced their failures as opportunities to learn and grow, rather than internalizing them.

How to build teams and manage employees.

Building a team and managing employees is an important part of being a leader, and many execs wish they had known how to do this sooner. For example, when working with people who are in their twenties, some CEOs may find themselves getting frustrated because they don’t understand the way these younger employees process information or communicate with one another. To avoid this frustration, it would have been helpful to understand the basics of team building and staff management earlier in their careers.

How to deal with rejection.

When you’re young, it’s easy to think that you can change the world. But that means there will be a lot of people who don’t want to work with you. Even if you get lucky and land your dream job, there are going to be plenty of people who don’t want to make room for you on their team. Many top execs wish they had learned how to cope with rejection sooner.

How to negotiate.

Some executives wished they had known more about negotiation tactics when they were younger. Negotiation is an important skill that top executives need in order to maintain a healthy relationship with their co-workers and bosses.

The importance of personal development.

Many adults in the workforce struggle with this. It’s especially true for executives who may feel a lot of pressure to be successful at work and provide for their family. For example, you’re expected to deliver results or people will wonder if you’re capable of that. People can become too focused on their current state, which often leads to them neglecting personal development efforts. When you neglect personal development, you run the risk of becoming an ineffective leader as time goes by. If this sounds familiar, it might be worth considering taking some time off work and focusing on yourself before your next job interview or promotion attempt. It’s never too late for personal development!