Redundancy is needless repetition of an idea. You can simply eliminate redundant words or phrases without changing the meaning of sentence.

Some common redundant phrases and how to fix them listed below:

Redundant                                Concise

refer back                                   refer

few in number                            few

small-sized                                small

grouped together                      grouped

my own personal feeling          my feeling

end result                                 result

serious crisis                            crisis

new initiatives                           initiatives