Sing the alphabet song several times a day. Kids learn songs fairly quickly. Teachers use songs to teach a variety of school skills. Sing the alphabet song while you're in the car, waiting to eat, cleaning up toys or using the bathroom.
Post the letters of the alphabet in a place where your child can see them. Teacher parent stores sell alphabet strips that kindergarten teachers often hang up in their room. Hang one up in your child's bedroom. You can use a pointer and point to the letters as you sing the alphabet song before bedtime. Find the posters that have the upper case as well as the lower case letters on it.
Read alphabet picture books to help your child learn the sounds of each letter. Many book stores sell book sets where each letter has it's own picture book. The book is filled with pictures of items that begin with one particular letter. For example, letter "Bb" book will have pictures of balloons, birds, bags or bulls.
Put alphabet foam puzzles together. Many stores sell foam alphabet puzzles in both upper and lower case letters. As you put these puzzles together with your child, ask questions. For example, "Can you find the letter M?" or "What letter makes the 'mmmm' sound?" are good questions to ask.
Use flashcards to practice the letter names and sounds. Simple letter flashcards can be found in most stores. Show your child a card and have him tell you the name of the letter and the sound it makes.