As previous posters have said we do our shopping with cash, we also break it down into weeks. And I always go armed with a list, although if our son is with me there are extra things that go into the trolley.
Like you, at the beginning of our IVA I found it hard to budget, my 21 year old brother kept telling me to be responsible, thankfully I have got the hang of it, eventually....
We're all the same - I love being able to stick to my list but do admit to putting in BOGOF's when it's stuff I usually use even if I don't need them that week!
Sharing from experiences of dealing with debt
The greatness of a man is not in how much wealth he acquires, but in his integrity and his ability to affect those around him positively.
Bob Marley. http://kallis3.blogs.iva.co.uk