Braiding your long hair at night is a great idea if you want to wake up with wavy hair in the morning. It can also reduce a bit the frizz and make the hair more manageable. Bear in mind, though, if the plaits are too tight you might wake up with a headache from the pulling. If your hair is just washed make sure you have toweled dry or slightly blow-dry the excessive moisture, especially if the hair is very thick and long.