To add on to the dishwasher/sink topic, two things that a certain someone in my household does:
1) I'll sometimes wash dishes at night before heading up to bed, and since we have one of those double bowl sinks, I'll use the one on the left to wash and the one on the right to put them in to air dry overnight.  Usually I'll put them away in the morning before anyone else even gets up, but once in a while she'll be up earlier and use a dish and then rinse it off and put it on top of the clean dishes that were nice and dry and ready to be put away.
2) My kids like to make themselves smoothies, and I've told them to clean the blender right away because it's so much harder to get clean if you let that fruit stuff dry and harden first.  But sometimes they "forget" or "don't have time" and no one gets to it before it's already dry.  So, since I'm a nice guy, I'll fill it with water to let it soak until they're around and can get to it or I decide to wash it for them later on.  Hours later I find that someone needed the sink, so dumped the blender out and put it on the counter where the gunk could get nice and dry and caked-on again.