There are several strategies that you could follow in order to get rid of cluttered writing. An outline can help you establish the ideas that you want to express and how they connect with one another. Another strategy would be using a thesaurus in order to learn words that can express the exact meaning you are looking for while taking up less space. Finally, a good strategy would be to keep your sentences short and in the passive voice, as this creates sentences that are clearer and easier to read.