If you really want to write, then shut yourself in a room, close the door, and WRITE. If you don't want to write, do something else. It's as simple as that.
Unlike some of the time-travel movies I love, like 'Primer' or '12 Monkeys,' 'Looper' is not about time travel. It's about this situation that time travel creates and the people dealing with that situation. So narratively, the big challenge was to have time travel get out of the way.

