Ideas
My sims are terrible about the water. If I leave them standing for even half a second, they want a drink of water. If I cancel the action, a lot of the time it re-queues before I can even navigate through the environment and pie menus to start them on an actual task. At one point I was having trouble collecting cards for the Ravendancer tarot deck because my sim kept cancelling the 'use intuition' actions and flying back to the cemetery on her broom to get a glass of water from the bathroom instead. Several of my sims are also obsessed with drinking orange juice or milk out of the fridge, they'll do it constantly and also cancel other actions to do it. Interestingly enough it doesn't seem to be all the sims that do the juice and milk, I sometimes wonder if there's a hidden trait that makes them worse about it than others. The water, though, is universal.