• Maintain consistency.
• Be wary of the word ‘ensure’
• Reword sentences that start with ambiguous pronouns like ‘this, that, those,’ e.t.c
• Address the reader directly with ‘You’
• Avoid the use of auxiliary verbs like ‘will, has, would, could, shall,’ e.t.c, and its ‘to be’ variants
• Cut out unnecessary prepositions
• Eliminate wordy introductory phrases
• Give concrete, and specific instructions. Make sure to answer the ‘who, what, how’ of each instruction
• Remove ‘Of’ when it is used to show possession in sentences
• Remove phrases like ‘who is’, ‘which is’, ‘that is’ …
• Have mercy on ‘So’
• Use inline styles to offset important text
• Eliminate repetition and redundancies

For further reading, see How to write content your users will read