Read the entire Bible over the year for a comprehensive look at God's word. There are 3 readings per day that are usually a chapter each, and in total it takes about 25 minutes each day. After an entire year, you will have read the New Testament twice and the Old Testament once.
Read key parts of the Bible over the year to focus on the key elements of the truth. This usually involves reading 1 chapter per day and takes about 10 minutes a day. It is based on Alec Carmichael's guide that can be downloaded here