[quote name='blindinglights']
Hoping Mr. 16 Miles @ Sub-8:00 Pace can bestow some wisdom on me.
[/QUOTE]
first, I second dmaul recommendation. It's a nice thing not to worry about.
Your endurance is lacking. Longer runs will help. If you are looking to do a 10k (6.2 miles). A 6 flat mile translates to an approx. 43 min 10k given your current fitness.
a 4X a week schedule that would help would look like this.*
day 1 Interval- 4-6 X .5 mile in 3-3:15 min with equal rest. Starting out do a few, then decrease rest, then add to the total number of intervals, then decrease time. (alternate workout is 2-3 mile workouts @ same pace). Always do at least a mile warmup EASY.
day 2 Easy- 5-8 miles all at 7:45 to 8:30 min pace. Start with less distance, then add more.
Day 3 Tempo- 3-5 miles @ 6:25-6:40. Warm up with 1 mile @ 8-8:30 pace then go faster. Start with the 3 miles and every 2 weeks add a mile. Then try to hit the faster end of the pace range.
Day 4 Long run - 8-15 miles @ 8:00- 9:30 mile pace. Start with less distance then add more. I personally like to hold a distance for 2-3 weeks then make a big jump, so weeks 1,2,3 would be 8-9 miles then I would jump to 11-12.
If you did this for 12 weeks, you would be in great shape to try to tackle your goal (although you would be closer to 40 min). You would do this workout for 3 weeks, then take are rest week where you run 4-5 days a week 4-7 miles EASY for a total of 3 segments. The other days of the week could be rest/ cross training but always take the day before your long run off.
After 8 weeks I would try a 5k at goal pace to see where you are.
* this is an agressive schedule but if are currently running 8 miles, you should be able to handle it.