Whether you're running your first or your tenth marathon, there are a lot of things that could go wrong during your training and racing. Here are some of the most common marathon training and running mistakes and how to avoid them:
Marathon Mistake #1: Don't run a marathon on a dare.
I've met people who started training for a marathon because a friend or family member teased or bet them that they couldn't do it. They eagerly signed up for the challenge without really considering the intense commitment it requires, only to throw in the towel halfway through the training or stubbornly suffer through it. Running a marathon is not a decision to be taken lightly. Basically, what I'm trying to say is to think carefully before deciding to train for and run a marathon. I always like to tell runners to try racing other distances such as 5Ks, 10Ks, and a half marathon before attempting a full marathon. Then they can see if they really enjoy training for a race and they'll have a training base established if they decide to go for a full marathon.
Also see: Are You Ready to Train for and Run a Marathon?