Stick to one thing at a time

David always finds it difficult to read, but he reads the same thing over and over until he finally understands

Do not look for motivation from outside.

David Goggins always tells everyone that outside motivation won't work when bad days come. That's why motivation should come from within. 

Push more after failure.

David always pushed himself, even after he failed at any task. 

Always remember bad days while complaining

When you realize how far you've come and how much you've improved, all excuses become small. 

Realize your negative points and work

David suggests everyone understand the negative points in them within themselves and work. 

Be a responsible man.

According to David, if a man takes responsibility for himself, then he can share his life better.