What's determined from an application
If you were to look at someone's resume that would work for you (forget SWA for now), what would you look at and how much would it be worth(great question right?)
In no particular order...and there are probably others
1. education
2. type of flying experience TT, Turb PIC time, Jet PIC, Part 121,135, military, CRM experience, ...
3. type of training
4. Captain experience
5. leadership in the cockpit (progression?upgrades?)
6. leadership outside flying
7. currency
8. type rated (B737?)
9. when did he initially applied (some people have said that SWA will "give you points for this"
10. teamwork oriented, experience in teamwork
11. customer service oriented
Other than upgrading or getting a type rating, there is probably little that you can do to improve your qualifications. The only sign that you will probably get is a "feel" for which people are being called when interviews resume. However, are you going to know why them and not you? That will be difficult. It may not be as easy as looking on the left side of the screen. Might as well spend you valuable time studying and prepping for your interview. Your competition will sure be doing that.