Tilt your head and ensure the ear is facing down. Let gravity work, and in a few minutes, water would get out of the ear.
Put your little finger inside the ear quickly in and out to create a vacuum. This method works for most people.
Chew gum for a few minutes, and it will create movements that help the water come out of your ear easily.
Block both nostrils with your finger and gently blow through your nose.
Still, if water hasn't come out of the ear, then it is better to seek consultation from an experienced professional.