Wash your hair with a mild shampoo to remove any dirt, oils or buildup from styling products.
Condition your hair with a moisturizing conditioner to help keep your hair from being too dry and frizzing up at the ends.
Towel-dry your hair and smooth some straightening serum or cream through it. Be sure to distribute the serum evenly, paying close attention to the ends of your hair.
Blow-dry your hair, using a large paddle brush to pull your hair out straight as you dry it. Dry one section at a time and use the brush to pull your hair out straight and tight so it stays as straight as possible.
Apply a little more straightening serum or cream to your hair.
Plug in your hair straightener and, if it has adjustable heat settings, adjust it to the highest setting recommended for your hair type, according to the manufacturer's instructions. If you aren't sure which setting to use, start with a lower setting and turn it up if your hair doesn't seem to want to straighten.
Clip your hair into 1-inch sections if it's long or thick so you can straighten your hair a little at a time and keep the rest of it out of your way while you work.
Clamp the hair straightener tightly around one section of hair. If you're straightening all of your hair, start as close to your scalp as possible. If you're only doing the ends, start a couple inches above the part you want straightened. Pull the straightener down toward the ends slowly, keeping the straightener closed tightly until you reach the end. Release the hair once you reach the end.
Repeat step 8 until you've straightened each section of your hair.
Mist the ends of your hair with finishing spray to help hold the style.
Straighten your hair only when you really need to. Let your hair go natural sometimes; the more heat-styling tools you use, the more you'll damage your hair. Damaged hair is harder to style than healthy hair.
Try to avoid humidity or rain; these can cause your hair to curl up on the ends.