Incorporating weight training into my program has transformed me. Results are much more progressive and my legs are so much stronger for running faster and tackling hills. My schedule the last two weeks has looked something similar to this:
Sunday: Squats, leg curls, lat pull downs, dumbbell chest press, barbell curl, tricep cable push down
Monday: Run my buns off
Tuesday: Leg press, leg curls, chest supported row, include dumbbell chest press, rear felt side raises, standing calf raise.
Thursday: Deadlift, dumbbell lunges, seated cable row, chest press, cable curls, tricep cable push down
Friday & Saturday: Fun in the sun