Basically, that 
I'm always surprised when people don't bulk buy things (toilet paper, store cupboard staples etc) or only buy name brands. How much tastier can a posh tinned tomato really be?
Dh is mortified when I reuse bath water to water the plants or make my own cleaning cloths from old pants. But he does love a charity shop bargain (most of his coats are from there).
What are your favourite thrifty tips or what thrifty things are you surprised that other people don't do?