OK, coming from a country in which it pours it down most of the time it's been a shock to me as to just how bad driving in the rain is here. I know it's normally sunny 364 days of the year, but it's still no excuse for the utterely pathetic driving I've seen when it rains here. Having watched some moron crash his car on a perfectly straight piece of road with nobody around him this morning (he saw a puddle about 2cm deep, slammed his brakes on, jarred the steering wheel to the left and went straight in to a wall - luckily nothing was coming the other way) I feel obliged to at least give you some tips.
Water is natural and perfectly harmless unless it's over 10cm deep. Do not react to every small puddle as if it's hiding some 3m-deep hole underneath it - you drive the road every day so you know it's not there. Slow down (judge this, if it's a small puddle then you do not need to go through it at 5km/h as people seem to do here, you can safely do so at 40km/h in a straight line), keep your wheels straight, if need be LIGHTLY touch the brake pedal and simply drive through it. Try to follow the tracks of another car if they've just gone through it. Whatever you do, DO NOT swerve in to oncoming traffic to avoid it and do not slam the brakes on. Simple, yet baffling how many people choose the latter course of action here.
If you do find yourself skidding, steer in the direction you want the car to go and if you need to, lightly touch the brake pedal. When you feel the car grip the road again, drive normally.
There ends your driving theory test for today. Drive safely.