Cyclocross (CX) has become one of the trendiest cycle modes in our country over the last few years. It arose in Northern Europe and is considered to be one of the most demanding modalities of the bicycle world as they must overcome all types of obstacles, on difficult terrains like grass or mud, combined with some stretches of asphalt. All of this with a bike that's practically a road bike, with small modifications that adapt them to hard, fast and mountainous terrain. These modifications are based mainly on the width of the chainstays, the height of the fork and the tyres, which have studs added that provide more traction and grip on more slippery terrains. The brakes are also a key point in Cyclocross: the position of the road handlebar and the rigid fork force you to change your riding style compared to that you'd use on the mountain bike. Therefore choose well the brake pads that you're going to use on a demanding terrain such as that of a Cyclocross circuit and make sure that they are suitable for braking with your wheels full of mud.
In order to overcome the planks, stairs and ramparts you need a good pair of mountain shoes whose studs will stop you from slipping when you get off the bike. As regards the mountain shoes, don't forget to clean the cleats well as they'll end up full of mud and dirt. It's an important maintenance that you must carry out, as it will stop you from becoming "trapped" in the pedals without being able to remove your foot from the pedal. Also, remember to clean and lubricate the chain and drivetrain properly as they are the parts most affected by the dirt.
And for a discipline as exhausting as CX, don't forget to prepare the isotonic drinks, gels or bars for before, during and after your activity. It will be decisive for obtaining good results and an optimum recovery.