Redundant adjectives
In a moment of hopeful optimism, she made the call. Adding two positive adjectives is inefficient, and you should remove one.
Several words that serve the same purpose.
The reason for this is because nobody cares. Stay open-eyed for redundant words and tighten the manuscript as much as possible.
Avoiding redundant details
Sometimes a text has an over abundance of description. Ask yourself, will this amount of details engage the reader or bore them.
Can I reduce some details but keep the essence of the meaning intact. Can I merge some details into one.
Avoiding redundant examples
How to avoid: ask yourself, is it necessary to use two examples to emphasise a point?
Can I reduce one example but still keep the meaning. Can I merge both examples into one.