In 2011 I trained for two (and ran 3!) marathons! Some of the references that I’ve used as I have planned my more recent training efforts:

• Marathon: The Ultimate Training Guide by Hal Higdon
• The Triathlete’s Training Bible by Joe Friel

I customized the training plan that I used in training for the April 2011 Illinois Marathon: my training plan

I keep track of my running in a few online logs:

• Daily Mile– great social interaction… friend me!  This is where I am most active! Friend me!
• Garmin Connect– I love to see my splits
• Training Peaks – a training group I work with has begun using this to distribute their training plans.