When I was 14 and starting my own business, or 16 and running a for profit ski club, or 19 and forgoing business opportunities or real-world experience to work with kids at a camp in Northern Ontario, not many people were congratulating me on following my passion.

I have a lot of compassion for everybody, even fake Tegan, honestly. Life’s hard. The world’s hard. Navigating this is hard. We all have issues.

I think stress ages us the most, and stressing about food is the worst. I eat a high-fat diet because it gives me the most energy and makes me think about food less. I can't be obsessing about food all day if I'm hungry because I only ate a salad. I also like feeling full. I will eat a donut if it makes me have a happy day. And for me, eating things that are considered 'bad' is part of what really gets me motivated to work out [laughs]. At this point in my life, I'll take what I can get.

I believe the common denominator of the universe is not harmony; but chaos, hostility and murder.

Don’t panic. Midway through writing a novel, I have regularly experienced moments of bowel-curdling terror, as I contemplate the drivel on the screen before me and see beyond it, in quick succession, the derisive reviews, the friends’ embarrassment, the failing career, the dwindling income, the repossessed house, the divorce . . . Working doggedly on through crises like these, however, has always got me there in the end. Leaving the desk for a while can help. Talking the problem through can help me recall what I was trying to achieve before I got stuck. Going for a long walk almost always gets me thinking about my manuscript in a slightly new way.

Writing fiction is not “self-­expression” or “therapy”. Novels are for readers, and writing them means the crafty, patient, selfless construction of effects. I think of my novels as being something like fairground rides: my job is to strap the reader into their car at the start of chapter one, then trundle and whizz them through scenes and surprises, on a carefully planned route, and at a finely engineered pace.

Treat writing as a job. Be disciplined. Lots of writers get a bit OCD-ish about this. Graham Greene famously wrote 500 words a day. Jean Plaidy managed 5,000 before lunch, then spent the afternoon answering fan mail. My minimum is 1,000 words a day – which is sometimes easy to achieve, and is sometimes, frankly, like shitting a brick, but I will make myself stay at my desk until I’ve got there, because I know that by doing that I am inching the book forward. Those 1,000 words might well be rubbish – they often are. But then, it is always easier to return to rubbish words at a later date and make them better.