One of the biggest challenges for people who is learning a language that normally do not use in their daily activities, I think it is keeping up a natural conversation with people who talk this language every day, I mean, when you go to the school to learn, for example, english, there is a sort of list with dialogues and expressions that you can use in known situations, and probably, after some lessons, you will manage to apply in a real conversation, however, the problems appear when you are in a meeting with people that just talk about their experience of a normal day and each one have a different story to tell, they do not follow a guideline, they jus talk and, in fact, even though you have learned pretty good your lessons and you know many expression, you will feel lost (well, maybe just I), because you want to participate in the conversation and talk about your own experiences but, oh no!! It did not appear in your english book, or maybe yes, but not all meshed.
Well, definitively, the just one way to learn a new language is talk and talk, even though you make misstakes, just follow talking and talking. It will be a really good exercise because is the just one way it forces your brain to combine ideas, thus, affter some time, you will be par of the group.
in addition, while you are improving your speaking, improve your grammar too.
Intresting blog about learning languages experiences
https://escargotlingo.wordpress.com
http://www.aldeaviral.com/155-frases-necesarias-para-una-conversacion-en-ingles-2/
http://elblogdeidiomas.es/203-expresiones-ingles-coloquiales/
http://www.abaenglish.com/blog/acronyms-english-language/
http://reallifeglobal.com/how-use-word-fuck/
http://fairlanguages.com/what-are-the-top-5-world-languages-in-2050/
http://www.bbc.co.uk/learningenglish
http://www.curso-ingles.com/aprender/cursos/nivel-avanzado 
