Some excellent tips on writing from Harvard psychologist Steven Pinker.
I admit that as a freshman I tried to increase the complexity of my vocabulary. I wanted to use lots of big words (which is what I thought ‘smart’ people did). I did not use most of those words correctly. First tip — don’t increase the complexity of your vocabulary.
“…imagine that you are in a conversation with a reader who is as competent as you are, but happens not to know some things that you know.”