Remember the old American Express commercial with the tagline, ‘don’t leave home without it’? Great advice, but the thing I never leave home without isn’t my credit card, it’s my grocery list. In fact, I’m adamant about not even entering a supermarket unless I have my list with me. If you’re currently trying to cut your grocery budget, a list is a must. I try my best to stick to mine, and am proud to say only one or two items not on my list ever find their way into my cart. I’ve gone so far as to create a master grocery list that’s stored on my computer. Each time…