In the old days I would occasionally do the food shopping on-line, and your previous purchases are already listed as 'favourites'.
It is horrifying to look at that list now and see what cr*p I used to buy on a regular basis - cream cakes, cookies, biscuits, frozen desserts, battered fish/chicken.
My shopping now takes place when I need it - and I spend about 30% of my previous spend.
Are the high-fibre products working Gary?