When rolling hair, start from the bottom of the hair, the top of the hair can be tied up first, one layer by one layer of the volume. If the amount of hair is not a lot, then you can also start from the sides of the hair a small handful of a handful of volume.

In order for the hair to roll out and look good, your hair must have layers. No layers of hair, how to roll will not look good Oh. I suggest you go to the hair salon to trim a long broken hair.
Choose the appropriate model (diameter of the curling iron) of the curling iron, 28MM, 32MM, 33MM, 38MM can be rolled out of the effect of large waves, the larger the number of rolled out of the volume of the larger, but the larger the number of rolled out of the waves will be easier to straighten. This needs to be based on their own hair to choose.