Tip #3: Let It Set
One of the biggest mistakes we make when trying to create a lasting curl is to use a tool like a curling iron, wand, or flatiron. These are great for ease of use and will give a nice temporary curl, but those curls will drop very quickly, especially if you have fine hair, or very heavy, long ends. You can still use your heated tools for a longer lasting curl, just add in one extra step. Clip each tonged coil to your head as you curl it, letting it sit on the head until it's completely cooled down. This goes back to point number one: you need to change the state to set the curl. Speed things up with the cool-shot button on your hair dryer, and only shake the hair out when it's stone cold. Your curls will last twice as long this way.
Tip #4: Leave Your Rollers In For as Long as Possible
Hot rollers are great for retro waves and styles that require lots of body, but most tutorials tell you to leave them in for only 10 or 20 minutes. This is fine if you're using them for volume or to smooth hair ready for an updo, but if you want curls that last through a night of dancing, then you need to let those hot rollers cool completely . . . which in our experience can take up to a couple of hours in thick or long hair. Plan ahead and keep your rollers in as long as you can. And don't forget to use a styling product!
Tip #5: Adjust Your Cut (If You Can)
If you have particularly thick or long hair, you'll probably struggle to get a DIY curl to stay in. The longer your hair gets, the heavier it is and the harder it'll be to get a uniform curl to stay. You may find the ends go frizzy and curly, but the lengths fall flat. You have a few options to fix this. Firstly, get lots of layers chopped in — especially around the front — to reduce weight and give the hair some bounce. You should find that these shorter sections curl better. Secondly, chop your hair a few inches shorter.
The simple truth is super long hair will not curl easily if it's naturally straight. Finally, if you can't bear to face the scissors, try twisting wet hair into a bun (or two buns for very thick hair) and sleeping on it, or try headband curls; dampen your hair, part it as usual, and put a narrow stretchy headband over your head so it sits halfway down your forehead and quite high at the back of the head.
Starting from the front, take a section of hair from below and wind it up and round the band over and over again, adding more hair each time as you move around the head (as if you're creating a big croissant with your hair). Leave this in for as long as possible — overnight is best. When you pull out the band, your hair will sit in bouncy, full curls.