Dealing with rejection
Despite your best efforts, you may ultimately receive the dreaded "thank you very much for your submission...many quality submissions...unable to move forward with publication" e-mail.
Resist the urge to read too much into such a response, as there are a variety of reasons your submission may not have been right for the journal at that time. Keep in mind that editors are not only trying to ensure a productive group of articles that will hopefully cohere into a single issue, they're also working on ensuring a diversity of topics. A paper on a subject similar to yours may have been published recently, or may already be in the pipeline.
It's also possible a particular editor just wasn't interested in your topic, or didn't see it fitting with his/her vision for the journal. For even the most professional of editors, there's a significant degree of subjectivity that goes into compiling issues.
If you were fortunate enough to get some feedback on why your submission was rejected, consider it carefully. Without an invitation to revise and resubmit, that particular journal probably isn't a good fit for your article, though you can certainly submit it to another journal. And take what comfort you can in knowing that you're not alone, and that even established scholars have pieces rejected.