Before the box…
Think: Are you a good candidate for haircolor? Crandall likes to think everyone is! (Except, perhaps, if you're pregnant or if you have a medical condition.) Beware, however, if your mane puts Rapunzel's to shame—you just might want to make an appointment with a professional. Extremely long hair is hard to handle at home.

Consider your hair color and skintone. If you were born a brunette with an olive complexion, going platinum may not be best. Opt for highlights or a more subtle, single-process treatment to complement your natural beauty.

At the store

Crandall recommends Preference by L'Or¨¦al conditioning color treatments. He warns, "Stay away from any product with too much hype and read the fine print¡ªit's there for a reason." Don't be fooled by the color on the box (which is most likely the result of a professional's work). He stresses that miracles are not sold at the drugstore.

As for so-called temporary treatments, Crandall warns to be wary. The color, if applied repeatedly, just might stay. "Temporary haircolor oftentimes becomes permanent. You can't be a blonde for the weekend," Crandall says.

After the box

Enjoy your new hue! Take comfort in the fact that if disaster strikes, a professional can reverse the damage. Crandall recalls the story of a loyal client whose roots turned pink after a rushed at-home haircolor session. Realize the impact of your decision and be careful¡­fluorescent roots are just a misstep away!