But, if you don't like to fuss too much on styling your hair, then go for very short style like buzz or crew cuts which don't need much maintenance but still look good. If you have curly/wavy hair, then just cut your hair with a simple cut, which adds some bangs on the front and is medium or short at the back.
If you are looking for a no-fuss haircut or are into sports, then consider this bold haircut. For buzz cut a razor will be used to cut the hair very short, and to add to the style add 2 - 3 cuts on both sides of the head.
So, always cut hair longer than the desired length, if you have wavy/curly hair. Get some layers on the front to get relaxed-looking bangs and cut the hair at the back and the side short. Then use a hair serum on wet hair and tousle your hair to get a sexy, unkempt look.
To get crew cuts, the hair at the sides and back are shaved off and the top hair is cut relatively short and graduated in length. This way the hair is maintained longest at the front of the hairline while at the back it's kept shortest.
If you wish to add more to these teen hairstyles, then get a few streaks in your hair. Make sure you describe the haircut properly to the stylist, so that you get desired look. Also, keep visiting the stylist every 6 - 8 weeks to maintain your haircut.