Doing Groceries

I know I should follow these three rules while doing groceries to keep myself healthy and financially disciplined.

First, never go to groceries on an empty stomach. I easily get tempted by the smell of fresh muffins or chicken wings.?

Second, stick to a specific list of items to buy. I tend to buy lots of snacks on impulse, which is harmful to my health and pocket.

Third, always go to the stores alone. I'm good at influencing my wife psychologically to make her buy unhealthy food.

Unfortunately, my addiction to instant gratification always keeps distracting me from the rules.