Resumes are extremely hard to write.  You must decide if you want the same type of job or something different.  This will determine what skills you will list, how long it will be, etc.  What you don't want your resume to be is a job description of everything you have done over your whole career.  While a professional can work with you to eliminate items and help you focus on what should be included,  you are the one who ultimately must decide what represents you.  Here are some general rules to follow on what you should eliminate from your resume: