On TeX.SX, Primal Pappachan asked:

“How can I introduce a non-technical person to LaTeX?”

There are several answers, for helping learning LaTeX without being too complicated. Yiannis Lazarides gave some of the best suggestions:

• Assist in the TeX installation and install a full distribution, to avoid frustration by installation difficulties later.
• Provide a small template and a compilable document which roughly meets their requirements.
• Assist with the first steps.
• We are used to table of contents, lists and index - a new user though might be impressed how easy that is.
• Explain the concepts of floats early - better show benefits than let a user run into unexpected problems with moving objects.

I would add:

• Point the way to up-to-date LaTeX online resources.
• Show how the mentioned Q&A site TeX.SX works, so he can ask for help or find existing solutions there.
• Introduce him to a LaTeX discussion forum, such as LaTeX-Community.org. A web forum is easy to use and you can talk and discuss, in contrast to a Q&A site. Usenet might be a bit harder to introduce.
• For best online support, explain the importance of code such as minimal working examples.

Visit the original question and answers on the site if you would like to read more.

Untypical for a Q&A site, there’s currently an exchange of views on TeX.SX:

As an expert, can you always use TeX for (nearly) any kind of document?
 

“Yes, you can:”

• It’s easy if you are a routine user, you know the common packages.
• Typing a letter, for example, is just like 20 TeX commands added to the text.
• You get the best possible hyphenation and justification, and a professional consistent look - why to abandon it for a “simple” document.
• After some time you’ve got a lot of documents to use as a template or as a start for a similar document.
• Your, let’s say, 16 years old document still work today. Try documents made with a word processor 16 years ago - can you open it today with current software, without layout loss or change?
• TeX users naturally have TeX installed. Some have a dislike for installing a huge wordprocessing software or suite such as Open/LibreOffice or MS Office - this is overkill for simple documents.

“No, you cannot:”

• For typesetting music, TeX may not be the best choice. Though there’s MusiXTeX, Lilipond seems to be favored.
• TeX should not be used for documents intended for quick onscreen use, such as manual pages which should be readable in a text console window. mandoc and Groff are recommended.

There are 16 answers until know. Perhaps you have a new important point to add? See the original answers with further points.