Pedalling away my front door was a big moment. But my most pivotal Doorstep Mile, the one where I truly summoned up the nerve to do what I really wanted to do, had come months earlier. The moment I committed to living adventurously happened sitting at a desk. 

It arrived amongst the rush and noise of Biology lessons and lunchtime duties at a secondary school near Oxford. I was a trainee teacher taking my first steps on an interesting, satisfying career ladder. A respectable job, money enough, shedloads of holidays and a nice pension. My mum would be happy.

So I was flattered when the Headmaster offered me a permanent position on the teaching staff. This was it! Acknowledgement that I was good at something. And a meal ticket, road map and safety net for the rest of my life. 

I thought hard about the offer for a couple of days, then sat down one evening to write my formal letter of reply.

Well done, my young me. Well done and thank you!

OVER TO YOU:
Who do you need to write a letter like this to? Write it now. Dare you send it?