I shop in the middle of the night. I fell into the habit when I worked a second shift job. It's the only way to shop.
For me I try to avoid going on Saturday or Sunday's. Too many people with their bratty, crying kids wanting everything on shelves whining, "I want this...", "I want this...".
Although, I see the well behaved children, there are far more parents that let their kids get away with behaving like little apes.
When I go grocery shopping I have an agenda. I know what I need, I get it and check out.