This was a quick read, and the version in French is written in simple enough syntax for an intermediate French student to read. There are several good suggestions, and they mostly mirror my experiences in learning a second language, and now in learning a third:
- Study every day, at least 20 minutes or so, and more is better
- From the beginning, speak paragraphs or dialogues out loud, and record yourself
- Write essays in the language, once you have achieved enough fluency to do so.
- Learn some new vocabulary words every day - a set number, maybe twenty or thirty.
- Learn and practice grammar (more on this below)
- Correct your mistakes and practice again until you can know the material without error
- Find a native speaker to practice with, or, much better, go to a country that speaks the language you are studying and immerse yourself. An immersion program is absolutely the fastest way to learn.
Following the above, depending on the amount of time committed to study and practice, one will soon start being able to think in the new language. Kaufmann is against worrying too much about learning grammar rules, and I disagree on this point. I found it very useful to know grammar rules in Spanish, and I always felt a little lost in German because of not having studied that language's fairly complex grammar.
All in all, not a bad book, though there is a bit more about Kaufmann's career than is absolutely necessary.