Exactly, Biggers!
What should I be aiming for?
Somthing you can keep up for hour after soul crushing, mind-numbing hour
I have met some unbelievably old, slow and otherwise unlikely audaxers, but they have all had a number of things in common:
They're comfortable on their bikes
They don't hang about in controls
To the otherwise uneducated, they're miserable sods
As a newbie audaxer, a large amount of your focus should be on keeping your bum off saddle for as little as possible. Until you're confident that you can get round whatever you're tackling in time, from the moment you get your card stamped at controls, be aware that "time is miles" and that the clock is ticking.
Other than that, you could do well to look to the past and
Velocio's code...
1. Keep your stops short and few.
2. Eat before you're hungry, drink before you're thirsty.
3. Never get too tired to eat or sleep.
4. Add a layer before you're cold, take one off before you're hot.
5. Lay off wine, meat and tobacco on tour.
6. Ride within yourself, especially in the first hour.
7. Never show off.
Hope this helps