Shorten, delete, and rewrite anything that does not add to the meaning. It’s okay to write in a casual style, but don’t inject extra words without good reason.
To make this easier, break your writing into three steps: 1) Write the entire text. 2) Set your text aside for a few hours or days. 3) Return to your text fresh and edit.
None of us can ever be perfect writers, and no one expects us to be. However, we can all improve our style and sound smarter by following these tips and writing naturally.