I buy toilet paper, tissues, washing detergent, dishwashing tablets etc when on special and keep them in cupboard until needed.
Generic brand everthing is found in my cupboard (usually made in the same place as other brands anyway). I also buy things on special at woolies such as herbs, wipes etc.
Nappies I buy snugglers from Big W as they are cheap and effective.
Good luck with cutting your bills!!