Totally agree about water - I have some stores (though so recently that I haven't needed to rotate them yet - thats coming up next month) - but not very much. You *can't* store enough water for months and months when you live in an ordinary town in an ordinary house ... so after a week's supply of water (for me), there comes water treatment - chlorine tablets, the makings of two expedient water filters (big 2 litre bottles, sand and pure charcoal), and a Katadyn mini filter.
Other storage - my water butts leak at the tap attachment
In the area I live in now, as opposed to where I used to live, there are lots of little streams, one only a few hundred yards from my house. Though there's quite a drop - so I need a siphon, maybe with a pump attached? I wouldn't really like to suck on it to get it going.
There's prepper mentality, and prepper knowledge - becoming a prepper is very likely to wake you up to the whole issue of water, its so much in the background of our lives, its very hard to bring it to the foreground.