Saving money isn't about forgoing all the joys in your life. Feeling broke can make matters worse, so it's important to do all you can to make yourself feel secure and "abundant", as Bentley-Moore puts it.
"Get clear on what makes you feel abundant. If spending 30p extra on organic bananas makes you feel rich, do that. It doesn't have to be every shopping trip or every item. Little energy shifts like that make the world of a difference." If you can stretch to small joys, then don't beat yourself up about it. Be sensible, but once in a while, a low-cost pick-me-up can remind you that not all is lost.