It started with sunglasses, this love of sunglasses. I was a house meneer, I was coming to the end of my community service at a mission hospital north of Pretoria and there was this opportunity to win a pair of sunglasses if I just entered a Mr Sunny Park competition.

I think my time at the trauma unit probably prepared me for an entrepreneurial career without me even realizing it. I mean, we don't get taught business at med school at all - in fact, that's one of the failings, I think, of the medical fraternity. But in a trauma unit, and this is what I loved about it, is anything can come through those doors.

The world is today what Hollywood said it would be 20 years ago. And the reason I say that is because media shapes culture - whoever owns the media owns culture, owns values, if you like. If I look at what is coming into our home, if I think of that big black pipe that runs into our home onto our screens, that's unfiltered, it's uncontested.

Alongside the pandemic that we've experienced in the last year, is an info-demic. There's just been this incessant amount of information pouring in at us and we no longer know who to believe.

What you need to know about vaccines is that they've had a really great run of success. I think the very first vaccine was the smallpox vaccine, developed way back in the 18th century. In fact, early immunization scientists in China would apparently take smallpox scabs, crush them and then blow them up your nostrils to create some sort of immunity.

So we're faced with coronavirus. There is a vaccine. Am I going to take it? Am I not? Not sure but we can't beat it - there's no cure. So what do we do? What's our best defence against coronavirus? In a sense, your best defence is being as healthy as you can be.

More coffee. Seriously, Harvard did this amazing study on coffee where it showed that the more coffee you and I drink, the less chance we have of dying. And I'm talking about a study of 20,000 participants over 10 years.

You've probably heard that breakfast is the most important meal of the day. I heard that from my mom, I heard that from my doctor and it's complete nonsense. There are studies that now show people who have breakfast often battle more with their weight than those who don't.

It's this whole idea of not what you eat, but when you eat, that's become vitally important. You might've heard of intermittent fasting. What is it? Is it any good? Without boring you, there is so much great science to back up the idea of intermittent fasting.

Exercise. In fact, this is probably one of God's greatest hacks. We know that insulin is needed to get sugar out of our bloodstreams. Except, if you and I exercise, when we exercise, there's a backdoor effect. There's a mechanism that allows us to absorb sugar out of our bloodstreams without or independent of insulin. Only with exercise, and that effect lasts for 24 hours of every bit of exercise.