First, you should towel-dry any excess water from your hair to prevent hair damage. It is advisable to keep the dryer at a distance of 20cm from the hair while switching between hot & cold air. This can prevent any hair damage caused by heat.
Avoid using a comb with plastic bristles as it can cause hair breakage from static electricity. The ideal way of brushing your hair is by first brushing the ends to remove tangles. Then, take long stokes from the roots of the hair to the ends. This technique will help to spread out the natural hair oil and thus prevent any breakage. By reducing the breakage, you will also be able to reduce your hair loss.