What are the three items you should pay attention to with regard to parallelism?

When ensuring parallelism in writing, focus on structure, grammatical forms, and consistency in lists. First, maintain a similar grammatical structure for items in a series, such as using all nouns or all gerunds. Second, ensure that verbs and phrases used in comparisons or conjunctions are parallel. Lastly, keep the overall tone and form consistent to enhance readability and clarity.