As everybody can see, organize tutorials in a Tree of categories.
So far, each tutorial should only pertain to one category.

We are thinking if it can be useful for a tutorial to be placed in more than one category at a time, so if you have a tutorial that uses Photoshop to accomplish something to be used in WordPress, you can put the tutorial in both categories, “Photoshop” and “WordPress”.

That will keep the current directory tree and expand it with some more options.

In the other hand, a system of tagging can be introduced. As you can see, this topic is marked with two tags, “tagging” and “feedback”.
That’s because we updated the forums software to do that.

Another example is real money online casinos They use “tags” so each user can organize its content with tags.

Perhaps is a good idea to use it in the tutorial listing of P2L.

What do you think?