Sometimes you can face a real dilemma regarding what to put on or leave off a resume.
Essentially, a resume is simply a marketing tool that features the highlights of your qualifications; not every job must be listed as that is what the job application is for.
Still, there is so much misunderstanding regarding resumes.
I have seen people list every job held, classes taken, achievements, etc.
Some of these experiences are far from their intended career aspirations, but I generally don't have a problem with most of them as it can show that you are a well rounded person.
However, listing a job you held for a month or two can raise a red flag.
If you list a short term job, be prepared to honestly explain your short stint, but if you leave it out you may be asked why you have a gap on your resume.
Personally, I would leave most jobs held for six months off of the resume but include this information on the job application if one is utilized.
What you decide to do is your call and if you visit the various career sites on the internet you'll find a variety of opinions on the subject, some of which offer conflicting advice.