Short and to the point. Read, read, read. The best information is still in books. You can get great information from watching videos, going to seminars and motivation speeches but the real gold is in the print. If you do not like to read, get the audiobook. I love audiobooks more than print because it is much more convenient for me. Occasionally, I do like to have the hard copy of a book if I really like it. Books are reference guides that should be read over and over. Furthermore, the beauty is your vocabulary changes the more you read. It improves exponentially. Start with the first book and go from there. I enjoy self-help books but for leisure, I also enjoy a good detective mystery/Thriller.
Book recommendations to get you started.
Steve Jobs by Walter Isaacson
10x Rule by Grant Cardone
Outwitting The Devil by Napoleon Hill
Think and Grow Rich by Napoleon Hill
Pitch Anything by Oren Klaff
You do not have to start with one of these books but it would be a great start. Now turn those pages. Get better every day.