Take the decision today to wear a cycle helmet and one day you might be thankful! A cycle helmet might not save you from every impact, but giving yourself the "possibility" of a second chance to life is plain common sense. Which would you prefer? No second chance, or a second chance because you did in fact wear a helmet!
A few references:
A 2002 USA study found more than 100,000 cycling head injuries could have been prevented in 1997 if all USA cyclists had been wearing helmets. 
Nearly 50% of cyclist admissions to hospital A&E departments are for head and facial injuries, and the majority of cyclist deaths and injuries are a result of head injury. 
...It Doesn't Take Much To Hit Your Head
Remember also that you don’t have to be hit by a car for a bike accident to be fatal. You can just as easily be riding along slowly and hit some grit, have a dog run out in front of you, hit a pothole, lose concentration, hit ice, slip on white painted lines, collide with another cyclist, hit obstacles etc. I’m sure you can think of many more scenarios…
The point I’m trying to make is that all bike accidents at any speed and on any surface could potentially cause a fatal blow to the head. And the worst accidents tend to be the shortest bike trips to the corner shop...! Just like it is when driving a car - the accidents happen when we least expect them!
Take my experience for example:
The first accident happened when I slipped on some black ice going no more than 10km/hr just a few meters riding out from my front door. In a flash I was down. My head was the first thing that hit the tarmac – whaaam!
All I remember next was lying in the middle of the road dazed with my helmet broken in four pieces.
I repeat: the cycle helmet was broken into four pieces.
What does this tell you?
It tells you that if I’d not been wearing my cycle helmet that morning, I could have been lying in the road in a coma, could have suffered brain damage, or could have died. It was a serious wake-up call.
What I’m trying to illustrate is that the simplest of bike accidents can be nasty and potentially lethal.
My accident involved no cars, no other people, no obstacles, no potholes – just a small patch of frost I didn’t see.
The decision I took to wear my helmet that day saved me from a serious head injury.
Secure Your Cycling Helmet or Risk Causing An Accident
Too many riders I see don’t wear their cycle helmets properly. From my observations this is especially true with children's helmets often not securely fastened with ill fitted helmets. Or not wearing one at all, which is clearly an irresponsibility on the side of the parent! I could never let my kids have ONE chance to life if they fall or are hit...I want to give them the best chances of survival - don't you?
If you don’t wear your helmet securely, the helmet won’t help you in the event of an accident. In fact, a badly fitted helmet can be the cause of an accident. That why they must be fitted properly.
Here are 5 important points on how to wear your cycle helmet properly:
Parental helmet fit guide for children, as well as adults alike:
1. Get the right sized cycle helmet! When purchasing a cycle helmet, the fit is crucial to you or your child's safety. As a beginner, you probably won’t know what a good fit feels like, so get some professional help from your local bike shop.
A rough guide is that if it’s too small it will pinch the front and back of your head. If it’s too big, it will feel like a ‘plant pot’ on your head. Go by instinct too – a bike helmet must feel comfortable, or you won’t wear it for long!
Helmets also come with inside padding adjustments. You should fit these pads to make final adjustments to your comfort. Never use them to compensate for the wrong sized helmet.
2. Position helmet correctly on your head. Helmet should be positioned square on your head, so that it doesn’t tilt over your eyes and restrict your vision, and it shouldn’t tilt too far back exposing your forehead.
3. Fasten straps securely. Fasten the straps together under your chin. Adjust the straps by manufacturer’s instructions and make sure the straps are lying flat against your skin, not twisted.
The straps should be done up so your helmet won’t move about if you try to move it on your head. The straps should be firm, but not so tight you feel your neck is pinched, or breathing restricted.
Strap adjustment can be difficult with small children. Be careful here because if you pinch their skin or have a bad first experience adjusting, they likely will scream to wear it.
Always insist a child wears a well fitted helmet: "Wear your helmet or no biking!"...They learn very quickly that putting on a helmet is part of riding a bike. It soon becomes second nature.
4. Check the cycle helmet abides by safety standard test stickers. Always look for safety standard test stickers usually found on the inside of every helmet:
Britain (BS 6863 or BS EN 1078), American (ANSI Z90.4 or SNELL) or Australian (AS 2063) National Standards. Ideally, a helmet should also have a British Standard Kitemark.
5. Double check all round vision. Make sure your cycle helmet fits your child. Bring their head and torso down into a cycling position. Check the helmet does not come forward and restrict vision.
Turn your head from side to side and up and down. Again, check your helmet is firm on your head as you move – head and helmet should be like a solid unit.
Give a light jolt to the side of your helmet. If it is completely displaced, you need to think about adjusting the straps tighter. If it’s not the straps, you need to think about changing to a different sized helmet.
Ride Responsibly and Be A Good Example To Your Kids!
Crucially, don’t be lured into a false sense of security wearing a helmet! This usually happens when you're new to wearing a helmet. A helmet won’t protect you from every accident, so you must continue to ride responsibly and adhere to the rules of the road. Basic road responsibility includes no jumping lights or taking new risks.
This will be harder for older children, so setting an example of good cycling road safety is important. Older children can opt to go on cycling courses for a weekend to be taught properly about cycling road safety. Otherwise young children obviously shouldn't be on the roads at all - a playground suffice - but they must ALWAYS learn to wear a helmet from a young age. Then when they get older it's not a big problem...and they always have that crucial second chance to life.
The choice to wear a helmet really comes down to how much you respect your head and your life, or your child's life. You never know if the next bike ride might be your last – so isn’t it better to give yourself at least a second chance? In my opinion, there should never be any excuse not to wear a helmet when you’re out cycling – remembering to wear it securely at all times.
So, what’s your excuse not to go out riding with your helmet? Do you wear one every time you ride? If you don’t wear one, why is that? I’d love your constructive views and comments! And, if you know someone who’d find this post useful just send it to them!
 Injury Prevention Vol 8(1) ‘State Level Estimates of the Incidence and Economic Burden of Head Injuries Stemming from Non-Universal Use of Bicycle Helmets’ (J Schulman et al, 2002)
 Mortality & Morbidity data (HMSO, 1998)