Step one: have a big idea. Take your time with this. Drink tea, watch the telly, lounge around. It’ll come, don’t force it.
Step two: do nothing.
Step three: answer an email from an American production company; explain they can’t have the script they want since it’s still under option, but you have got this big idea …
Step four: there is no step four. It’s over. You’ve achieved your goal.
Easy, isn’t it?