Read what you want to cite, keep it going in your mind for at least one day then write. in that way you would succeed in paraphrasing what you have read.
By being concrete (clear) on the very purpose of reviewing. Read relevent papers, cite your own ideas to establish the specified objective and make statements on your own sentances & style
One can avoid plagiarism by using freely available plagiarism checker tools upto the certain extent. But don't heavily rely on them as sometimes the output contains more false positives.