Air-Dry Your Hair
Give your strands a break from the hot air by letting them air-dry. Over time, the heat from your blow dryer breaks down the cuticles that cover and protect your strands, which leaves your hair drier, more brittle, and dull.
Bonus: you can twist your mane into a bun when it is still damp, and when you take it down later, you'll have natural-looking waves. Just run some texturizer through towel-dried hair before looping it into the topknot.