What Jilly said.
My staples might be WAY different than yours, if we have different goals. If you are trying to eat on a lower carb plan, my grocery list wouldn't work well for you at all.
Most people on the board WILL agree on lean proteins (though some of us are vegetarian, so they rely on non-meat sources) and non-starchy veggies. Past that, we're all doing something just a bit different, based on our tastes, our goals, and the plans we've decided to follow.