Things I refuse to cheap-out on

1. Paper towels
2. Toilet paper
3. Shoes
4. Bras
5. Winter coats
6. Skincare products
7. Appliances/electronics
8. Tools
9. Cleaning products
10. Laundry products

I find that if you spend a little more on these things, you will need to replace them less often and they will work better, saving you money.