After a long weekend of crazy sales everywhere you look, I managed to find the right words to describe the strategy behind a logic non-impulsive shopping method thanks to Vicki Archer.
These are the rules :
Look at only what you know you want.
Buy as if the item is full price, meaning you would be prepared to pay full odds so that any reductions are truly genuine.
Buy what you know works; save adventure for another day.
Take advantage of the prices and replace the classics.
Buy only if you need or love an item more than the one at home.