Get off your butt and start jogging again. Remember how diligent you were at exercising while in graduate school? Somehow, you managed to climb out of bed at 5:45 every morning to go run 5-6 miles every day. What's going on now???
You have a stable job that is, for the most part, regular hours and no overtime.
You have considerably LESS stress than you did in graduate school; no more feelings of guilt, no more overbearing PI, no more pressure to get perfect results, no more guilt trip/ threats from assorted professors out for my thesis blood.
You live in a much safer neighborhood, with sidewalks, heck, even a nearby park and trails to run on. So why not RUN??!!
Maybe you need to go to sleep earlier instead of messing around on the compooter. Yeah, that would help =)
Do your best, don't give up, and remember that it takes a couple of weeks before running becomes "habit." Go for it!