Ways not to lock your bike

I'm in berlin now, and it makes me sad to think of this thread, seeing that most people here have very little problems with just locking the wheels quickly and go into a shop etc. Maybe not for an expensive racer, but for normal bikes for sure.
Feels like it should always be that way. So much wrong about how in the UK cycling comes with all these hassles.

was in cologne a couple of weeks ago. my friend was pointing out bikes that had been left on the street, totally unlocked for weeks on end.