for me speaking and writing are the most difficult, because I'm from Costa Rica so here we speak in spanish, and it's difficult to find a place where you can practice with someone else
I think some rules about times is diffucult.
grammar especially forms of verb.
It is interesting to find people who have the same goal. I wish you to achieve success.
I understand you. I live in a small city in Russia and have no chance to practice English here. Fortunately, we have a good chance to find native speakers through Internet. Speaking ans writing are also the most difficult for me. I am trying to sing English song to improve pronunciation, to talk to languageexchange partners through skype, to do interactive exsercises on different sites, but I still have many problems with articles, prepositions and so on. I can't use advanced vocabulary in my speach, although I understand complicated words when I read or listen to them.
I was thinking the same thing!
It is all about practice, but sometimes I got frustrated, Why cannot speak well??? hahaha
I listen to music and I understand almost everything I watch TV shows, movies, etc... and it's the same thing, my facebook is full of english pages about sports, news, fun, and I can read and understand...
I've been studying english since 2010 by my own