When drying your hair with a hair dryer, you should set it on the coolest setting. Hot air can severely damage your hair, so you do not want to keep the blow dryer blowing on one spot in your hair. Make sure you begin the drying process by patting your hair down first.
It is a widespread myth that using a coloring product on the hair will always leave the hair damaged and weakened. Most coloring products these days are formulated with a lot of added conditioners so it is pretty safe to use them. Go to a salon if you are not sure of how to do it.
If you care about your hair, watch your stress levels. Stress can trigger a condition known as telogen effluvium, causing your hair to fall out. The condition is usually temporary, usually dissipates as your stress levels fall. It can occur multiple times in your life, though, and in rare cases, the loss is permanent.