I am doing the Dublin Marathon on 31st October, how much training should i be doing and how?

Question

i done the dublin one 3 years ago in 5 hours 9 minutes, but done nothing since!

Answer 1

It really depends upon where you are now... Get this month's issue of Runner's World. They have an article on marathon training for slackers (insult not intended). It's an easy marathon training program.

You may also want to look at this site: http://www.marathontraining.com/

There are plenty of books on the subject as well... check out the sports section at the library / book store.