Don't allow yourself to sleep for more than 30 mins- regardless of your usual habits. Pairs racing is the toughest and really does you over.
Don't over do the energy drinks- use water every other time out.
Use Power Bar Ride Shots and SIS Caffeine gels- I swear to god they make you a faster rider.
Do double laps- more rest between, more chance to get a rhythm and changeovers are less pivotal in a 24hr race.
Have a support team to do stuff- feed you, have stuff ready for you, tell you when to go (I can guaratee that at 3am you won't remember when you're next due out at all and you'll have an angry team mate). They can make pasta and make it a hell of a lot easier.
Don't expect to see your team mate at all.
Being the weaker half is more stressful- I always feel like I let my mate down but we always seem to do OK.
Be prepared to shit 8 times a day for a week after, and all of it through the eye of a needle. You'll also be really grumpy and might puke a bit of blood. (Erm, maybe. That might just be me).
Luke- 2nd Relentless 24hr pairs, 1st Hit the North, 4th 10 Under the Ben, 1st Dawn Raid.