Focus on running, keep your weight training short and simple. Your goal with weight training is to augment your running, NOT to wear you out. A long weight training session of high reps and many sets will simply serve to make you tired. You should not be tired after a weight training session. That being said, you will probably be tired coming INTO a weight training session because I'd suggest you weigh train on your harder running days. That way your recovery days are actually recovery days. Remember you get better not be training, but by the supercompensation done between hard training sessions (or hard weeks, months, years, etc).
Here's a simple weight training program:
Squat warmups then a max set of 4-6
Bench warmups then a max set of 4-6 or Pushup AMRAP
RDL warmups then a max set of 4-6
DB Row warmups then a max set of 4-6 or Deadman Pullups AMRAP
Progress towards a single max set of 5 reps. So for example if you max 5 rep for the squat is 135lbs your set buildup would look something like this: 45x15, 95x5, 115x5, 135x5. Your first set should always be rediculously light and a higher number of reps to warm up the muscle and prime it for movement.
Progression over the course of months should move from more reps to less reps (ie: lighter weight to heavier weight) and from simple exercises to more complex. Start with a month of 10-15 reps non-max just to get the movements mastered. Then drop down to the single set of 4-6. Then you can alter the exercises to make them more dynamic/complex such as Split Squats, T-Stab Pushups or Renegade Row, Alternating DB Bench or Cable Alternating Press, Single Leg Deadlift, etc. Once you move to more dynamic/complex exercises the goal isn't on simple strength but on speed of movement. The focus when perfoming a more complex movement should be force production so keep the weight lighter than a 4-6 rep load BUT increase the speed of movement so that the force production is equal. Example: If you performed a Squat for 5 reps at 135lbs and then progressed to a more dynamic Squat movement (ie: faster speed) you would drop the weight to say 100lbs but increase speed of movement both concentric and eccentric (up and down fast like a piston).
So an example for a 6mo program might look like this:
Month 1: General Conditioning
*4-6 exercises
*2-3 sets increasing in weight, 10-15 reps but not to failure
*Minimal rest
*2 workouts per week
Month 2-3: General Strength
*4-6 exercises
*Warmup to 1 max set of 4-6 reps, go to failure only on the last set
*Longer rests, up to 2:00
*2 workouts per week
Month 4-5: Increased Explosiveness and Dynamic Exercises
*4-6 exercises
*Decrease weight, increase speed of movement. Option to use single joint exercises and exercises that use opposing leg/arm movements
*Include the use of plyos and other jumping/explosive movements keeping the volume low (no more than 5 reps, 2 sets)
*2 workouts per week
Month 6: Maintenance
*2-3 Exercises
*Decrease Volume by reduced exercises and/or sets.
*1 workout per week
That's all I got for now.
Alan