Cut your hair
Water, shampoo, conditioner and the energy your hairdryer uses all cost money — not to mention all those pricey gels and sprays. How do you spend less on these things? You have less hair. You may want to stop short of actually shaving your head, and if you have at least a 10-inch ponytail, you can do a good thing and donate that hair to organizations like Locks of Love or Wigs for Kids.