You misunderstood me.
I meant only buy stuff you can afford to pay off at the end of the month.
Like if you know you will have £200 spare in your bank after you get paid then only spend £200 during the month.
I thought about getting a card because at the moment i am un-employed untill i start work in two weeks, an dthen it could be another 4 weeks untill i get paid and I need to buy food.