I have a resume, I don't bother listing all the jobs I have done as I was temping for about 2 years in many different offices I just put the ones I enjoyed and my current job on there. For my current job however I got a load of things to list under the duties section that makes some interviewers ask why I ain't applying for managerial positions.
I also tend to have to downplay my it skills somewhat for employers at times, the amount of times I have heard the reply "sorry Mr Causer-Smith you're just too over qualified for this position." I actually once lost my temper with an interviewer when he said that and demanded to know why if I was willing to accept the pay he offered and I could do the work I was over qualified, the guy just couldn't give me a satisfactory answer to that.