holy cow! 35-40mpw is your most ever and you're a college kid with a passion for running? Well, the first thing is to keep increasing mileage. Since you have never run very much, I'd only increase it by 5mpw every other week and keep it steady or even back off a little if you ever start to feel overtrained. There's really no way you can be a very good distance runner on anything less than 60mpw, and many would say 70-80mpw. If you're not running on scholarship or anything, you probably aren't gonna want to build up to anything crazy, but 65-75mpw should be doable, especially if you run twice a day.
As for workouts I'd do one long run a week, one long steady state run, and one shorter faster run. The long run should be pretty easy paced but if you feel good you can pick it up a little, just don't hammer. Same thing goes for the SS, except it will be at the high end of easy. The short faster run should be something like 4 miles at your 10 mile race pace, or classic Daniels' "T" pace. Do some strides 2-3 times a week (make sure you're loose), and you should be good to go.
Trust me, if you do all that you'll probably PR at every distance above 800 without even doing any "speed" workouts.