1st HIM Orlando, FL May 2010, 1st IM October 2010 Great Floridian

I will be turning 50 April 2010 so - I signed up today for my first HIM next year in May. I am planning a Ironman in October 2010.  I have been doing international distances off and on since 1987.  I have been training for three months on the bike and running.  I will begin swimming in January.  I am currently working out 12 hours per week without doing any doubles.  Six of those hours are coming on Saturday and and Sunday.  This week I will begin doing doubles of running and biking about 3 times in a week.  I am doing a 1/2 marathon the first week in December.  I am doing a century ride the third week in November.   

I say all of this to point out that I have not structured my training. Basically I bike one day run the next and take off 1 day per week.  I have been doing long runs of 11 or so miles and long rides of 65.  I want to make sure I do the best job possible with my training in order to complete the HIM and IM next year.    Can anyone give me a link or book or any advice that I could use to structure my training more?


Thanks