It is always interesting to see how tourists relate to foreign currency. I know I probably do it myself when I'm abroad; staring puzzedly into my wallet and pay for a pack of gum with a herd of camels. it is one of those things it's just horribly difficult to relate to.
Even in Norway where everything is expensive - a lot of money still IS worth a lot of money, it's just that you can't usually buy a lot of things for it. The easiest way to get accustomed to new money and what ACTUAL value it has is by comparing it to something you buy quite often. Like the kilo price of pineapples, a serving of beaten and sauteed lobster or the tag on a pack of cigarettes. Actually - I'm trying to be serious, but it's hard.
Personally I always go by converting the foreign currency in to Norwegian Kroners before I buy anything abroad. The problem is just that I completely lose perspective after a while. "500,-? That's just like a night out in Oslo, that's not a lot at all. I mean, you pay like 120,- for two beers and then you pay 50,- for the nightbus and maybe you buy crisps at Deli de Luca, that'd be like 25,-. So it's 195,- in total. And maybe you find an underground casino and you blow 305,- at rulette. Happens all the time. And this is such a pretty teapot. Doesn't cost more than a night out. No worries. Si Si Signor, I'll take it, thank you".
You see? - So what you ACTUALLY have to do is to not bring your wallet at all when you travel. It prevents it from getting stolen, it will not reduce, but it will at least help stabilize the amount of teapots in your cupboard, You wont lose it, or confuse yourself with foreign money.
Basically that's the way to go. Just make sure you go on really short holidays at a time so you wont get too hungry.