as mentioned above, keep it absolutely under 1 page and only use relevant information. in your case this would be your undergrad degree/relevant coursework pertaining to individual jobs/any completed projects, research etc. this is all standard advice.
before reading the rest of my post, bear in mind i do not know how far along in your MS 1 year got you.
you have to make a decision regarding how to handle postponing grad school on your resume. i would not suggest writing a partial MS (since that really isn't a thing), so if you wish to convey that you did some GTA/grad level classes/started(?) on thesis work that is up to you, but it will raise some flags as employers read it since it wasn't completed (regardless of your situation), and there isn't a particularly professional way to address the reasons for dropping out on a resume.
you want to find the most ideal place to alert them that you have done some MS work, but would need an appropriate forum to explain the reasoning for not completing it. i'm not entirely sure what the best approach would be, as you obviously would want to have employers know you both 1) have some graduate level education completed and 2) show an interest in furthering your education. without having seen any specifics of your resume, i would say it would be most appropriate to address it in a cover letter, as you can briefly mention both the ms experience you have accrued and quickly justify dropping out. this portrays the information early in the process to employers which may help you get access to more interviews where you can describe in more detail what you had accomplished in 1 year of your MS program, without taking your resume off-course with non completed thesis work which may land you in the do-not-call pile, fair or not.
pm me if you'd like to discuss anything further, and good luck!
This post was edited by eighty6 on Dec 26 2014 12:03am