To be honest, I just can't get into keeping track of what I spend right now. But I'm a young adult with a more basic financial system due to having few assets. I mean me and my fiance have our own place, but we easily save up money each month without trying.
What changed my spending was pretty simple. When I saw something I liked, I would think of reasons I
didn't need it. Not reasons I did. This would usually trump whatever lingering ideas I had in my head about wanting/needing the item and I would just look at it longingly and put it back. Eventually I was able to think of the reason's I didn't need the item, and be able to put it back without feeling any sadness lol. My fiance sometimes has to sit and wait for me as I clutch some lovely thing at the mall and tally up the reasons I don't need it before I set it back down.