Repetition is the mother of learning, but the best practice is deliberate and conscious. You can become a conscious writer through feedback and study.
If you do not have an editor, you can invest in a solid and educational grammar and spell checker. Many people assume spell checkers are for lazy writers, but in my experience, a good checker provides feedback and teaches you grammar.
I use Grammarly. Grammarly reviews your text for correctness, clarity, engagement, delivery, and style. It will even check your work for plagiarism.
Grammarly delivers reports that break down how much you have written, your most common spelling mistakes, and even rates your vocabulary against other Grammarly users.
Grammarly encourages you to define your intent. This sets the tone for your writing and conditions you to consider it even when not using the app.
The most important thing about Grammarly is that it explains why it made every edit suggestion. You can choose to learn more about the topic directly in the app.
There is one benefit that software has over editors. When feedback is immediate, you can naturally and gradually unlearn lousy writing habits.
