After more than a decade of writing life-changing advice, I know when to move on. Here’s what else I learned

In the very first instalment of my column for the Guardian’s Weekend magazine, a dizzying number of years ago now, I wrote that it would continue until I had discovered the secret of human happiness, whereupon it would cease. Typically for me, back then, this was a case of facetiousness disguising earnestness. Obviously, I never expected to find the secret, but on some level I must have known there were questions I needed to confront – about anxiety, commitment-phobia in relationships, control-freakery and building a meaningful life. Writing a column provided the perfect cover for such otherwise embarrassing fare.

I hoped I’d help others too, of course, but I was totally unprepared for how companionable the journey would feel: while I’ve occasionally received requests for help with people’s personal problems, my inbox has mainly been filled with ideas, life stories, quotations and book recommendations from readers often far wiser than me. (Some of you would have been within your rights to charge a standard therapist’s fee.) For all that: thank you.