If a fall marathon is in your future this year, you’re probably still on the early stages of your training plan. It’s not too late to take advantage of some training advice that could help you get that personal record you’re seeking.
Are you doing interval workouts or repeats? Are you doing any tempo runs? What about fartleks?
These are all training tools designed to get you used to running at a faster pace for a longer period of time. This post from Christine Luff - http://tinyurl.com/lm8k4a - will get you started on learning to apply some of these training strategies. Additionally, if you have not checked out the marathon training section of http://www.runnersworld.com/, it’s not too late. These folks have really bulked up on information to help you perform better in this year’s event.