How much extra did you have with the swim cutoff and the bike cutoff?

Is there anything you can do to bank some time, like speed up transitions?

Do you have aerobars on your bike?

For the run, are you running the whole time, but slowly, or run/walking, or running and then spending time recovering? Can you work on speeding up your walk, so even when you are not running, you are making nice forward progress?

Can you reduce the amount of time, on the run, you spend going through the aid stations and the special needs stations?

Will this be your first marathon-distance run?