Non-native English speakers (like me) may encounter hardship in conveying their ideas. I am not aware of any miracle strategy to overcome this obstacle. However, the following strategies may help:
It seems that Dr. Eric D. Turley from the English Department holds weekly sessions to help foreign students writing their theses. During Fall 2004, these sessions were on Fridays from 12:00 to 1:00 pm in Room 219, in the English department. You may want to contact Dr. Turley for more details.
Keep actively working on your English by reading news magazines and listening to the radio (e.g., BBC and NPR).