After searching for useful latex guides, manuals, tutorial, etc. for months now I've noticed a general lack of description of the relations between different types of markup. I estimate (from my long search) that a vaste majority of (so called) guides and tutorials simply explain what single markup elements do which is rather useles in latex because you almost never need help to use them in you
document, but in complicated nested environments (e.g. a table in a header in an include). In the latter case all guides (which are acutally just manuals or lists) fail, because they don't link information (a description of
mbox is not sufficient if there's no description of where I can use it and - even more important due to the horrible compile error messages of (pdf)latex raising errors thousands and thousands of signs after the actual cause with completely unrelated message - where not).
Instead of providing the 19838th copy of existing flattened information in the 1245th latex blog, has there been no attempt to provide a guide putting markup in relation? I know that the set of possible packages is endless and such a guide which would have to reference at least some of them would be out of date soon, but so far I don't see how one can learn latex in an efficient - and even more motivating - aim focused way (feel free to edit for the last term :)).