After washing my hair, I slather it in leave-in conditioner, to help combat the dryness and frizziness. I use A'kin Lavender & Anthyllis 24 Hour Intensive Leave-In Conditioner 150ml, $15.30. Leave-in conditioners give your hair a bit of extra moisture, and help to protect it against heat styling.
Some other options:
$25 and under: Giovanni Vitapro Fusion Leave-In Hair Treatment 150ml $22.50, Giovanni Direct Leave-In Conditioner 250ml $22.50
$30 and under: MOP Leave-in Conditioner 200ml $30