Make a list of the key ideas and arguments your summary should convey and decide the order you would like to preset them.
Keep your summary essay short. Try to not go longer than four pages. Keep key themes short while highlighting the important information. In the book "Discovering Differentiation: Strategies for Success in the Language Arts," the authors stress that summary writing is a skill that writers must master in order to be successful in any field, namely because nobody wants to hear someone "go on and on."
Check and double-check for spelling, grammar and clarity.