http://www.cc.kyoto-su.ac.jp/information/tesl-ej/ej45/tesl-ej.ej45.fr1.pdf
This Hungarian woman taught herself (very interesting for Lingq fans - talk about self-motivation!!!) some 16 languages.
See Wikipedia: https://en.wikipedia.org/wiki/Kató_Lomb
Kato Lomb’s 10 Suggestions for Successful Langugage Learning
can be read on internet, see: http://www.langhacking.com/lomb10dos.shtml
Have fun