I havent written a resume in about 4 years... but when I used to write them when I was applying for heaos of jobs, I would always keep them short and sweet. I would actually write a new one for each job I applied for so I could tailor it to that job and their criteria. Dont put meaningless crap in it, it will just be annoying for the person reading it and they could ignore your resume altogether. I have always just put a short coversheet at the front, then a list of my previous jobs (including what I actually did in that job) and any relevent courses I have done.