Discipline Quote

Set a specific time and place to study, and your mind will show up ready to learn - Brian Tracy
It's about hacking your brain's natural tendency for routine. By creating a consistent study ritual, you eliminate the mental energy wasted on deciding *when* and *where* to start, so all that energy can go directly into the actual learning.

Communication Quote

If you must make corrections, make them indirectly - Dale Carnegie
The core message is about preserving a person's dignity and ego when you need to point out a mistake. It's not about avoiding the truth, but about delivering it in a way that doesn't trigger defensiveness.
If you want to improve a person in Meaning Factcheck Usage

Belief Quote

If you want to improve a person in some way, act as though that particular trait were already one of his outstanding characteristics - Dale Carnegie
The core message is about using positive reinforcement and reputation as a lever for change, rather than criticism.