You'll probably not get it perfect first time. Obviously, I've done a few with some success now and I find the following works-
- Eat after every stint. Even if you don't want to.
- Eat what your body actually wants, not what you feel it should have (I always make a vat of pasta and at 3am I know I should have it but my body wants a bacon roll). If you don't get into the habit of eating at least a little regularly you WILL bonk at some point, which when it's snowing at 2am and you're only a third of the way into a lap you will not appreciate. Take gels on the course.
- Make sure your bike is in perfect condition when you set off.
- In pairs, go fast. It's a race, pairs is hard, but ride fast. You will have plenty of time to recover between laps. Pace yourself within reason, but you're not doing it solo.
- Don't sleep for more than 20 minutes or you will feel awful and not ride your best. Sleep regularly, though.
- Change your kit regularly, even if it's not wet. It feels better and being happy is the key to success.
- Swap between energy drink and plain water. I find too much energy drink makes me ill and you do get fed up of drinking it if you don't have water too.
A few Puffer specifics-
- Take every bit of cycling clothing and footwear you have ever owned, and some spares (particularly shoes). Being cold and wet will ruin the race for you.
- Even though the laps are short, I still find one lap on one lap off is fastest. Usually do doubles or triples in the small hours to cram in more sleep.
- Wear clear glasses. Getting grit in your eyes over the course of 24 hours will ruin them.
- Take many brake pads. It was much better last time I did it, but it used to be a pad eater.
- Take a gas heater or similar. We were in a caravan last time and it was wonderful.
- Come 2nd. 2nd place always gets better prizes than 1st.
Enjoy it, I love the puffer.