In addition, ask yourself what's the purpose in writing an abstract? When I'm looking for information among the millions of papers in the thousands of journals available today, I don't have time to read each and every paper. The absract, which can be a single sentence, tells the reader what's in the 100 pages or so that follow. That's what an abstract does, and that's why it's important.
Before I even start writing a paper, I've already got my abstract in my head. It's a three line, maybe four or five line paragraph explaining the gist of my paper: who or what I am writing about, why I am writing about it, and whether my ideas agree or disagrees with past and present views on the same subject and why. That's it.
Abstracts pretty much write themselves, once you fill in the 6Ws: who, what, when, where, ho
w, and why. ^Get those down and you've got yourself an abstract.
All the best.