Wise advice on environment

Your environment shapes your ability to focus. Design it with care - Brian Tracy
The core message is that your willpower is finite; your environment is a constant. Instead of relying on sheer mental force to concentrate, you should proactively shape your surroundings to support your goals.

Quotes about concentration principles

Your mind learns best in short bursts, not long marathons - Brian Tracy
The core message is simple but profound: Intense, focused periods of learning are far more effective than long, drawn-out sessions. It’s about quality of focus over quantity of time.