So I get this question all the time. And the purpose of this post is not to belittle the acquisition of useful new knowledge in your field. However, I have found that when people ask this question, what they're really asking is, "Is there a secret shortcut I can take to avoid doing the work I know I have to do to get where I want to be?" So, the short answer to that question is, no.
When I was in high school, I was a serious chess player. It was my thing and I was very into it. I wanted to be competitive and have madskills. I did what everyone else does in the beginning. I learned tips and tricks! Zing! Look at this combo I memorized! It's a trap! If you don't know the trick then I will win! But what I found out along the way, as I played more, and against people with more skill, was that tips and tricks only take you past the absolute bottom of the game. Only the people who have hardly ever moved a chess piece will fall for that crap, and if you play someone with any fundamentals at all, you're toast. So I had to start learning the fundamentals to rise above that level. By focusing on fundamentals, and taking the long, slow road of playing tens of thousands of chess games, I eventually became the Utah State Speed Chess Champion my senior year. If I just brought my tips and tricks there, I would have lost every match. Guaranteed. On the other hand, if I went there with stellar fundamentals and never picked up a "Tips and Tricks" book, I still would have won.
Photography is the same. Every endeavor is the same. This is how the universe works. If you really want to improve--I mean if you're REALLY serious--then stop asking this question and go to work. Conceive a concept, produce the shoot, create the image, go through the retouching process, and try to market your work. You will learn much more from this than you will ever learn by looking for shortcuts, or hoping that someone further down the road can somehow download their experience into your brain. Tutorials are terrific. Mentoring is valuable. Looking at the work of 200 years of masters is excellent. But you need to search these resources for the basics, the fundamentals. How does light work? How do I work my camera? What is it about an image that is engaging and interesting? What kind of work am I drawn to? How can I best use composition, balance, color, contrast, focus, etc.? The very best photographers in the world are still working to answer these basic questions, and that's why they continually improve and impress. This is why they never tire of the process. It's not a shortcut. It's not a fad diet. It's a life change.
If you want the fruit of your garden, you have to water it every day. There is no overnight shortcut. It takes time. If you want huge muscles without risking your health, it takes a long time. You have to exercise consistently for years. If you want to be the greatest photographer of all time, do you really think there's a shortcut for a reward like that?