Isn't it stressful when we spend more than expected, right? especially if we follow a budget, having a smart spending habit is a good way to avoid such situations or events....
Op you are absolutely amazing and the points which you mentioned are very awesome and it will help in the economy of every house if they follow. Well I personally follow the whole week food chart in which I decided what to eat on which day and there are also plan for the guest as guest come at every time 
. Some people buying a branded things and I am wonder why they are wasting that money if the same thing will work better then that branded things. Mostly our monthly budget is out because of the wrong management and expenses on useless things. Just write the whole month groceries in a note book and fix a suitable fund for it and then you will be free form buying it to the whole month. If we make plan and going according to it then we will easily manage it even in a low salary.