Weeks 13 & 14 of Ironman training - Adjustments

The training is getting very real now as I've wrapped up weeks 13 and 14.  I have one more week in my base building phase and then I'm a third of the way through the program with the next 10 week phase focusing on building strength.  The next phase will incorporate some higher heart rate workouts even though for the majority of the race I will be operating in a lower heart rate zone.  The thinking is that there will be times throughout the race day that I'll run my heart rate up to a higher zone and I'll need to be able to pull it back down into a sustainable range.
The theme of this entry is adjustments to the workout plan; adjustments to the workout itself and adjustments to the schedule.  I've already made the adjustments to the workout plan before I started any of this training, I believe this is vital to success as you need to prioritize the workout schedule around your previous commitments to family or work.  I've discovered over the past two weeks a couple of other adjustments I'm going to need to make.
The next two phases of my training plan calls for swimming workouts three days per week (currently the plan has two per week).  I had a long workout day last week that called for swimming 2,500 yards straight without rest, and I accomplished it with ease; another 1,724 yards and I'm at the entire 2.4 Ironman swim distance.  Also just yesterday I had a 2 hour 45 minute bike workout in which I rode the Ironman bike course loop around Verona, Mt. Horeb, Cross Plains, and Middleton, and this I did not accomplish with ease!  So in the next phase I'm making the adjustment to eliminate the extra swim day and replace it with an extra bike workout.
The point is, I'm not afraid or concerned about making adjustments to my workouts.  What I am very careful to do is plan my adjustments ahead of time and make them in writing as to not question or forget them.  I find that if I wait until the day of my workout or actually during my workout to make the adjustments then I'm taking the easy way out and cutting corners off my workout.  Make the adjustments to your workout to fit your life, but do them ahead of time and prioritize your workouts among the other items that are important to you.