Seriously guys the advice given above is almost laughable.
First of all always wear your seatbelt and get your passengers to belt up too. The seatbelt is there for a reason. It also stops you flying through the windscreen.
Secondly make sure your suspension and braking system is in good order. Replace any worn bushes, shocks and steering components. Rubber components always wear out. Replace them. All braking systems are hydraulic. Make sure that all your brakes are working right.
Lastly ensure you have got decent tyres on the car. Your tyres are the only thing keeping you on the road. There is no point in risking your or anyone else's life over a dodgy set of tyres. Ensure your tyres are inflated to the correct pressure. Also have your wheels aligned to ensure they are all pointing in the same direction.
There is no reason whatsoever for you to simply lose control of a car. It is a user operated machine not a donkey. Drive within the limits of the road, local conditions and more importantly ensure you can come to a stop within your immediate visibility. If you cannot come to a complete stop within the space you can see in front of you then you are going too fast.
I drive a 20 year old car. I have and do take high speed corners at over 120kmh however my 20 year old car has tyres designed to do the job and all suspension components as well as steering components are in good serviceable condition.