stop buying unnecessary things

I tend to buy a lot of unnecessary things for me and the kids. I need to stop doing this. If I go to the store with a friend shes always like do you need anything, I say I am sure I can find something! That needs to stop. We are putting every bit of change and left over money in a jar for vacation, I like the looks of the jar, so I just need to remind myself about the jar and how much we already have so that I don’t want to spend money on useless things.