That’s the kind of behavior you want to change.  What can you do to stop yourself from making impulse buys?
assistant
Are they large purchases or small purchases?
assistant
How do I stop from buying things I don't need?
user
What kinds of things are you buying?
assistant
All kinds of things on sale
user
Do you buy something on sale once in a while, or do you buy things all the time even though they aren’t on sale?
assistant
I buy them because they are on sale though I might not need them.
user
What kind of things are you buying?  Are they actually things you want and need?  Or are they just impulse buys?
assistant
impulse buys
user