Here are some things mentally strong people do –
1) They welcome Challenges and Embrace Change
Challenges are part of every day life. A person has to learn how to start facing them as soon as they creep up.

Fundamentally, change is constantly in flux, and to keep abreast of it, welcoming challenges is encouraged. This is because difficulties help us discover new perspectives in our views and leave us with lots of lessons to learn.
2) They Don’t Waste Energy on Things they Cannot Control
It’s not wise concentrating on things you can’t influence when you could be focusing on what you can actually control. When you start calculating your spent time in terms of energy exhausted, you soon realize it’s waste of scarce resources.

That energy that you are channeling to the wrong thoughts could have been better utilized by another gainful insight which may not manifest anymore because your thinking went off track.
3) They are Willing to take Calculated Risks
Whatever is at the end of the risk spectrum must be worth it. If its worth it, then it also demands that the task needs all your best to make it work.

Generally, risks are taken to solve a problem. So, if the risk you are taking isn’t going to solve a problem, best to reconsider what you are actually risking it all for.
4) They Celebrate the Success of Others
Truth be told, no matter how good you are, there are certain success that you just can’t attain. However, there are zillions of others you can achieve, and none are more important than the other.

But, whichever form success manifests even outside of you, it’s cool to share in the joy. That is someone’s crown of untold efforts right there.
5) Ability to Quickly Move on
Moving on doesn’t mean everything is forgotten. Mentally strong people will rather keep a good memory than sour it with unnendless needless frivolities. They don’t like running around circles.

They know what they want, and will always go for it. But, as highly efficient risk assessors, they will always figure out if their risk will be worth it.