Sing "The Alphabet Song" to your child frequently. Some children learn new ideas and concepts easily when they hear them put to music. You can sit down and sing with your child, but don't be afraid to sing throughout the day as you perform your usual activities. You can sing to your child in the car, at bedtime and even while you wash the dishes.
Read books about the alphabet to your child. Any type of reading is beneficial for your child when it comes to learning his letters, but for added fun, consider looking at alphabet books together. Since alphabet books are colorful and imaginative and focus on one letter per page, they enable your child to really take a good, hard look at a specific letter without being overwhelmed by several letters pushed together to form a word.
Art is one way you can introduce your child to new ideas, such as the letters of the alphabet. Some children feel pressured when reviewing flash cards or an alphabet chart, so create alphabet-centered projects with your child to teach letters in a fun, non-threatening way. You can cut out letters from pieces of construction paper, then allow your child to decorate them. An alternative is to create drawings or crafts of animals that begin with a specific letter. Make sure you say the name of the letter out loud as you work with your child so he learns to associate both its name and appearance with it.
Play letter games with your child throughout the day. Give your child a set of letter magnets and let him put them on the fridge or arrange them on your floor. Keep a basket of alphabet blocks handy if your child likes to build things. Point out new letters and ask your child "What's this letter?" Make sure you follow up by saying the letter several times so your child learns it.