First of all, a good submission is professional in quality. It adheres to all of the guidelines for submission, and stays within word limits for the paper proposal, the abstract, and the biographical statement. It is lucidly written and error-free.
Second, it has a point or an argument to make, and does this clearly and strongly. The scholarly interest or importance of the presentation should be easily discernible by the vettors.
Third, it presents its argument in a way that would be intelligible to someone outside the specialty field. Remember that ACCUTE is a generalist conference, and that the audience for your session could be equally general.
Fourth, it is achievable within a tight time period. ACCUTE conference presentations are strictly timed for 20 minutes. A twenty-minute paper is about 8 double-spaced pages in length. Simplify and streamline.