I go shopping for junk food when I'm hungry, every single thing at the supermarket looks good and I end up eating things I otherwise wouldn't have considered. Unhealthy things.
I went to the supermarket, put way too much stuff in my trolley and then actually did reality-check, putting things back. I think I probably saved around 1/3 from not buying all the superfluous stuff :)
PocketSmith: A new budgeting experience!