How to say nothing in 500 words, an old tutorial from Paul McHenry Roberts on how to eliminate padding in your writing:

The student’s tendency to hedge stems from a modesty that in other circumstances would be commendable. He is, he realizes, young and inexperienced, and he half suspects that he is dopey and fuzzyminded beyond the average. Probably only too true. But it doesn’t help to announce your incompetence six times in every paragraph. Decide what you want to say and say it as vigorously as possible, without apology and in plain words.

None of it is new advice, but it’s all damn good advice.