Here are some tips on how to improve your communication skills before you English becomes perfect
1. Write more ... all the time
2. Use short sentences and words you know well
3. Use bullet points in emails with clear logics
4. Don't cut and paste
5. Go to lunch with co-workers, don't just sit in your cubicle and eat your leftover from last night everyday.
6. Spend less time reading Wenxue City :-) spend more time reading CNN or other English websites.
7. Watch more drama on TV , less Chinese/Korean operas.
8. Try to sing along with pop songs in English (your pronunciation will improve , trust me ...)
more... when they come to me