De-load weeks can be a god send! Once you get to a decent amount of mileage, consider staying at that mileage for a few weeks. Jack Daniels suggests increasing weekly mileage by the number of runs per week. For instance, if you’re doing 30 miles per week, over 5 runs, do 30mpw for 3-4 weeks, take a de-load week of about 15-20 miles. After the de-load week go up to 35 mpw, then repeat. Good luck!