While extreme forms of frugality, like reusing toilet paper (ew), are best avoided, if you're desperate to get the most out of your purchases, then it's time to crack out your scissors.
Over at One Good Thing, Jill Nystul offers various suggestions for making your domestic essentials go that much further, including everything from candles to toothpaste.
Sponges also get the thrifty treatment, with Nystul suggesting you chop them in two to make them last longer.
On the surface, slicing your sponges in half seems a little absurd, but honestly, it's no different to buying a large piece of sponge or cloth (possibly wholesale) and segmenting it yourself.
Depending on how far you want to take it, you can adopt some of Nystul's other tips, such as diluting your hand soap or disembowelling your toothpaste tube. Really, it's up to you how much effort you want to go to save.
Frugal ways to extend the life of your stuff [One Good Thing]