It is quite easy to get caught up in the ‘happy shopper’ mentality of
What I mean by that is – It is easy
to buy tools, nice to haves, I want it, what does it do(!?) and the like based on the notion that one day I might need them.
Focus on water and food.
In the Netherlands, where I live, we take water for granted. It is everywhere!
Water faucets, pumps & hoses
Water bags, carriers, containers
Water purification tablets
http://www.hiking-site.nl/materialen_waterfilters_pocketfilter.php (Dutch - experience based - maintenance manual for the Katadyn Pocket Filter)