Totally great advice! One of the first things every newly minted expat has do - throw out the mental calculator! Otherwise you would never buy a thing here and that means you'll never get integrated. Just accept the prices for what they are and pretty soon you'll adjust to the cost of living being 'normal'.
I totally agree, except in cases where you go back to the states regularly. In that case, I would calculate the Us price of non-essential goods so that when you go "home" you know what's worth filling up your suitcase with. My first trip back 2 years ago, I weighted down my suitcases with peanut butter, post-it notes, grape jelly, Catalina and Easy Spirit walking shoes. Now, I pretty much stick with shoes, jelly and Catalina-I can get most other things(or substitutes) here, or the price difference is negligible.
Surprisingly, Costco's prices here are pretty close to US prices on most things when you do the conversion.