and take full advantage of the situation and smoke a joint :P not only will it make you impervious to any sort of anxiety or supernatural attacks, but it will also afford you a great time :D
I think if anybody does what I did they can improve.
watch a lot of films
chat or speak in English with people
read a lot - this doesn't help much but gets you familiar with lots of words.
There's no other way than constantly using to improve your skills.
so take whatever chance that is...