We often think of audiences as being either supportive or oppositional, but you sometimes have to persuade those who simply don’t care.
Adjectives play an important role in helping us describe, but avoid an over-reliance on them. They sometimes add nothing more than decoration.
The passive voice has gained a bad reputation because people who discourage the use of it fail to explain when it is acceptable. Passive sentences are an important part of good writing when used selectively.
You occasionally still see two spaces after a period, because people tend to do what they were taught in school.
But it actually has been obsolete for more than 100 years.
A key to being persuasive is to provide concrete details, rather than abstract generalities, and the information doesn’t necessarily have to be in written form. Spoken words also can influence behavior.