three elements of the ideal language learning system

Ok, so I am going through my drafts. I don't know where I was going with this, or where I got the inspiration, or if this is even written by me. But I'm publishing it anyway, maybe there's some info someone can use.

The ideal system — and progression — of learning languages is based on three elements in this order…

1. Effectiveness (Priority)
2. Adherence (Interest)
3. Efficiency (Process)

Effectiveness, adherence, and efficiency refer to the “what”, “why”, and “how” of learning a target language, respectively.
In simple terms,
you first decide what to learn, based on usage frequency (priority);
you then filter materials based on your likelihood of continued study and review, or adherence (interest);
lastly, you determine how to learn the material most efficiently (process).

Read what you read in your native language. Learn the vocabulary that's necessary for your every day life. That is CREATE YOUR OWN FREQUENCE LISTS.
Use the target language as a vehicle for learning more about a subject, skill, or cultural area of interest.

The most pertinent questions will be “What will you spend your time doing with this language?”
The answer is the same as “What do I currently spend my time doing?”