Throughout the years, I have taught myself many things. 3D modeling and VFX design, web design, programming, and the like.
All of those wouldn't be possible though without tutorials. A tutorial is a practical walkthrough of the steps to achieve a desired result.
For instance, a tutorial for how to make a fruit smoothie will walk you through the steps of making the smoothie. It will tell you exactly what you need to know - and nothing you don't.
If you're trying to learn Photoshop, you may have dabbled in the official Adobe training books.
But let's be realistic. Who actually talks like that? Most training books are written like technical manuals and make everything sound more difficult than it actually is.
If you are seriously looking to better your Photoshop skills, you need to find some well-written tutorials.
There are hundreds of thousands of Photoshop tutorials on the web for nearly any filter or effect - or how to create something, like a website layout. There is no end to them. But to be helpful, a tutorial needs to be written well and needs to explain each step thoroughly.
I love Photoshop tutorials for several reasons...
1) They make it very difficult to mess up
2) You are exposed to new methods and workflows in a constructive manner
3) They provide an environment for testing new settings and functions
A large part of learning Photoshop is trial and error. When working with a Photoshop tutorial, play around with settings and filters. Add a layer effect to see what happens.
This way you can see what kinds of effects work well together and what doesn't work. That experience will help you get better and better.
Do some searching. Look on Google for "Photoshop tutorials." There are thousands out there. I know you will find something you like.