So I'm assuming you're planning on running your TT on Sunday, 1/30? Assuming that, here's how I would structure your training. (I think you have a solid shot at 8:40, by the way
Sunday, 1/16: 9-10 mile long run w/ last 2-3 quicker
Monday, 1/17: Easy day (double if desired)
Tuesday, 1/18: Speed workout of 8-10 x 400 @ 83-84 w/ 60-75s standing/SLOW jog recovery. Do the intervals until you can't hit the pace, up to 10 intervals--based on your workouts and race, I think you need to work a bit on underside speed and focus on hitting even splits.
Wednesday, 1/19: Easy day (double if desired)
Thursday, 1/20: Easy day (double if desired)
Friday, 1/21: Cutdown workout--1200m in 4:42-:45 (goal pace +30-35s/mile), 90s standing/SLOW jog recovery, 800m in 2:52-:53 (goal pace), 90s standing/SLOW jog recovery, 400m in 83-84 (just under goal pace). 400m walk/jog then 800m in 2:49-:50, 90s standing/SLOW jog recovery, 400m all-out. The first set shouldn't feel too bad, but the last 200 of the second 800 and the 400 should be hard. This is your last really hard workout.
Saturday, 1/22: Easy day (no double)
Sunday, 1/23: "Long" day of 7-8 w/ last 2 miles quicker
Monday, 1/24: Easy day (double if desired)
Tuesday, 1/25: 2 x 600 @ 2:08-:10 w/ 2 mins standing or SLOW jog recovery, 2 x 200 in 39-40 w/ 2 mins standing or SLOW jog recovery
Wednesday, 1/26: Easy day (double if desired)
Thursday, 1/27: 2 x 400 in 84-86 w/ 60-75s standing or SLOW jog recovery, 1 x 200 w/ first 150 in 30s and last 50 hard
Friday, 1/28: Off
Saturday, 1/29: 15-30mins easy, strides. Although if you have a pre-race day routine that you prefer, stick to that.
Sunday, 1/30: 8:34-8:36 2400m.