Don’t shop hungry. If you’re shopping for food, it’ll make you buy more. If you’re shopping for anything else, it’ll make you hurry. Also avoid shopping depressed. Buying stuff you don’t need won’t make you feel better, but if you’re not careful you’ll do it anyway.
I've been giving financial advice for 40 years, and I'm a millionaire several times over. Here are the 10 best bits of financial advice I've both given and taken.