If you have any kind of computer credentials, emphasize them in your resume and interviews. Any actual certification (even if it's semi-cheesy) of your having computer know-how will help you, and it's probably possible to get such a certification in a few months, if you haven't already.
Though admins are rapidly becoming more computer-savvy, they (and head coaches) still love the idea of having someone with genuine computer skills on staff: someone who can set up/update a website, be efficient with record-keeping, and so on (and on). The idea is to make yourself indispensable--and if your skills are only at about the level of most other college grads', at least be the guy who volunteers to do all the computer-related tasks!
Otherwise, there've been a lot of good serious suggestions on this thread. I especially applaud the idea of getting out of your comfort zone. When you go for Level Two certification(s)--soon, I trust--don't do it for distance...your personal competitive experience will be the credential for that. Instead, focus on the throws and/or the jumps. In particular, a truly knowledgeable pole vault coach--somebody who can do more than check steps and catch the pole--is a very valuable commodity.
Learn-by-doing will give you a better feel for coaching the throws and jumps, and will impress other coaches with your commitment to the *whole* sport. Even if you're a 98% slow-twitch guy, you can still achieve a basic competence in those events, and getting some patient instruction in PV--even if you personally can only clear five feet!--will give at least a clue about what real vaulters are up against. If you need to use the women's or HS boys' implements for the throws, do it--but get out there and give it a shot (so to speak). Your own learning process will prepare you for coaching others.
More generally: avoid being pigeonholed. The two best distance coaches whom I have personally known well were a decathlete and a hurdler/LJer in their own college careers, and they've coached NCAA champions (individuals/teams). By the same token, a guy who was an outstanding distance runner is winning championships in a tough t&f conference and sending multiple athletes to D1 Nationals--and nowadays he coaches everything *except* mid-distance and distance.