When shampooing, massage your scalp and don't scratch it. Rinse your hair well, ideally twice with every shampoo. The scalp is very sensitive, so take care with hair products that can dry and irritate it.
Alternate your usual shampoo with a dandruff shampoo. If you find the flakes make an unwelcome return, don't panic. This often happens, just switch to a new shampoo.
Make sure your diet contains enough vitamin E, selenium and zinc. Flaxseed oil is also said to help prevent dandruff and can be taken in liquid or capsule form.