Yellow sticker tips?

I always used to visit about an hour or two before the shops closed. To have a five minute break from the kids when my husband would read them a story etc.
I rarely go to shops these days - but when I do it is generally later on as I hate shopping and prefer to go when it's quieter - Asda have the reduced shelf stuff in there..but I haven't had huge bargains like I used to. Waitrose really Mark theirs down, again a few hours before closing.