Titles and Headings: should be concise and informative. Accuracy is more important than catchiness
The opening paragraph: Take care to distinguish the description of existing knowledge from the description of the paper's contribution.
Don't say too much at once.
Tense
Present tense is used for (1) eternal truth (2) Statements about the text itself.
Past tense issued for describing work and outcomes.
Either past or present tense can be used for discussion of reference.
Repetition and Parallelism: Watch out for sequences of sentences beginning with "however", "moreover", "therefore", "hence", "thus", "and", but, then, so, nevertheless, nonetheless.
Choice of words: use an exact long word rather than an approximate short one.