Here is the most critical warning of this article:
In the high-stakes arenas of business, sports, and personal development, the difference between victory and defeat often comes down to a single, elusive concept: . It’s that 1% improvement, that unique strategy, or that mental shift that separates the good from the great. finding the winning edge pdf
If you are specifically looking for existing PDFs, here are legitimate sources (avoid shady "free download" sites that may contain malware): Here is the most critical warning of this