Make sure legs are shaved.
Wear oldest smelliest grunters so that pusher-offer gets a real nose full
Remove mudguards, bell, wheel reflectors and playing card with clothes peg
Use clingfilm to streamline beer gut and hanging outy bits
Put a bit of sellotape across nose
Select hardest gear possible at start and gurn off like Rasmusan having a pineapple suppository
Pedal like mental for 3 miles, blow for the final seven
Shout your number as you go past the time keeper, then go back and really annoy them by asking your time while they are trying to log others
Definitely moan about your time not matching your cycle computer, the timekeepers have never done this before have they
Don’t ask for Poweraid or SIS in clubhut afterwards, it’s tea and cake only
Seeing as you are a mountainbiker you will probably pass the entire field before the finish, remember to have a nice chat as you go by and leave a good impression. Take a few photos on the way and post them up here later.
On a serious note, don’t forget to thank the pusher-offer and starters.