Hair Brush: Splurge! Cheap plastic bristles can break and tear hair. Opt for a more expensive boar bristle brush which distributes oils evenly throughout the hair, leaving it soft and shiny.
Shampoos and Conditioners: Save! Drugstore brands are just as good as the salon brands, if not better. The ingredients are not as strong, making it lighter and less harsh to your hair.
Blow Dryers and Straighteners: Splurge! Expensive blow dryers are much stronger and cut down on styling time, which means less exposure to heat and damage. Better quality blow dryers also make hair smoother and shinier than cheap ones because of the high end technologies, like ionic blowdrying. Good quality, ceramic flatirons are worth the investment because they heat up faster, smooth the hair shaft better and are less damaging.
Curlers: Unless you curl your hair more than once a week, save on this product!
Products: Splurge and Save! Splurge on a daily leave-in conditioner with quality ingredients, and a styling serum that protects hair from heat damage. Save on other hair products so that you can have everything you need to create a special hairstyle.
In the end, you should only invest the money on things that will last a long time and protect your hair from damage, anything else you can go ahead and save on.