Studying the history of creativity in your industry.

"In order for you to figure out what is going on today, and project your brilliant ideas into the future, you need to have a firm grip on what happened yesterday and why." -Jeffrey Gitomer.
Therefore, I did a google search on "history of snorkeling." The website says that the root of modern snorkeling can trace back to 5,000 years ago. Sponge farmers from Crete used hollow reeds to breath underwater. Later, animal skins that contain air and diving bell were used. Pretty interesting, eh? That just recalled my time in grad school, I had to take a class about history of gaming. By doing so, I can understand what's the purpose of each gear and equipment and how they're developed.
Per Gitomer's suggestion in his book, I also purchased "Thinkertoys" by Michael Michalko from amazon for me to think creatively. Yay can't wait. I'm like a college student assigning my own assignments.