My favourite lines from my favourite film.

And so he told me his secret formula for happiness. Part one of the two part plan was that I should just get on with ordinary life, living it day by day, like anyone else.

But then came part two of Dad's plan. He told me to live every day again almost exactly the same. The first time with all the tensions and worries that stop us noticing how sweet the world can be, but the second time noticing. Okay Dad, let's give it a go.

And in the end, I think I've learned the final lesson from my travels in time, and I've even gone one step further than my father did. The truth is I now don't travel back at all, not even for a day. I just try to live every day as if I've deliberately come back to this one day, to enjoy it, as if it was the full final day of my extraordinary, ordinary life.

Some say people can't change.

Past behaviour is somewhat indicative of future behaviour, but not really.

Seligman says the best way to find out what I will do next Sat is not to look at how I spent my last Sat.

The best way is to ask me directly what I plan to do next Sat.

That's why you can't judge people by what they are doing today.

It is the movie playing in their heads that determines what they will do.

What movie is playing in your head? Is it a story of success, love and respect?​