You have chosen to participate in a conference that is essential while you are on the path of pursuing your PhD. You have all the required information you may need for writing your abstract and you have the requirements in place in your mind, in terms of the topic, word limit and other stiff but surprisingly you still struggle with how to do it and from where to begin with.
So, I am going to tell you how to write an abstract in almost 30 minutes. You abstract is a wonderful combination of some aspects that you cannot and should not ignore. The first thing you need to know is what is the motivation of the research you intent to undertake, why is it important to care about the problem and the results? What is the problem you are trying to solve should be a part of the problem statement? The next important thing to include is the approach that you go through to solve the problem? In the approach section, you need to know the means you adopted to make a progress in the problem. Whether you used simulation. Analytic model, field data for an actual product or whatever? The next thing to include in the abstract, which you cannot and should not ignore is the results. The results in the answer to your research problem. Very briefly, the abstract should also include the conclusion which means what are the implications of your answer.
When you sit down to write down your abstract, simply copy and paste these questions onto a new document. Then start answering them one by one. You may even talk loud when you are writing. Do not focus on style and grammar and focus on getting ideas out first. These should be the first draft of the abstract. Once you have the answers, simply delete the questions and print out the first version. Now is it to manipulate the text into readable text in correct English and ensuring that each piece flows smoothly from starting point and background description towards results and conclusion.
I am sure you would be able to simplify your abstract writing task with this formula and do try it. If you have another approach or technique do share with us to let us know how to do it more easily.