Speak to your baby clearly and often. Make sure the baby can see your mouth when you're speaking. Babies learn words through mimicking sounds, so the more often they hear your words, the more likely they are to repeat them. By seeing what you're saying, the babies can also learn to mimic the mouthing patterns that go along with the words.
Read stories to your baby and allow her to read along with you. Point to the words as you speak them. Look at your baby often when saying the words. Babies love rhythm, too, so a rhyming book may keep her more interested than a non-rhyming one.
Use flash cards with your baby. Just like adults, babies often learn better if they're allowed to associate a new word with a picture. Use repetition often and speak slowly. If you find that your baby is repeating the word, give him lots of praise and attention.
Sing English songs with your baby to help her learn the language. Make face-to-face contact with her and exaggerate the annunciations of the words. Pick child-like songs with demonstrable actions, such as pointing to different body parts or displaying facial expressions.
Play computer games with your baby. There's a wealth of resources online or you can purchase CD-ROMS, which will help guide your baby through the English language in an interactive way. Always be with your baby when playing the computer games. Not only will this help them learn better, but it's an excellent opportunity to bond with your child.