While pre-schoolers should not be formally taught to read in my opinion, there are many different kinds of reading readiness activities you can provide around the house that will help encourage a book-positive attitude in your child.
First, and most importantly, you should yourself enjoy reading and let your child observe you engaged in reading activities of different kinds, so that she can see there's a purpose behind reading.
Second, you should spend time reading to your child. Just before bed is a good time to read your child her favorite story book. Soon, your child may learn to read along, although it's important not to try to teach your child anything at this point. Your child will do her own learning, through osmosis as it were.
Third, engage your child in lots of different language activities, including frequent conversations and periods where you can share jokes, riddles, songs, poems, tongue twisters, and other verbal games and experiences. These activities help your child develop auditory discrimination, vocabulary, sensitivity to syntax, and other skills important to later reading success.