If you have a mobile phone, take up photography and specifically developing as 'photographic eye'. If something catches your attention, think about what it was that drew you to it. Was it the colours, was it unusual in some way, did it constrast with its surroundings? If you're going to take a snap, ask yourself three reasons it should go on your wll. If it won't, why won't it? If you looked at it from this or that angle?

That's all about interaction with the world around you and how you 'respond' to it, what you perceive and how you perceive it.

If you don't like the idea, what does that tell you about yourself?