If you are looking for a particular biblical topic to study for the New Year, let C.J. Mahaney's words encourage you to seriously consider studying the doctrine of adoption in 2008.
"In order to experience more of the love of God, the affection of God, the closeness of God, the generosity of God, I want to recommend that for a season you study the doctrine of adoption until you are assured and secure in the love of God. If you are unfamiliar with the gift of adoption, I want to encourage you to restrict your spiritual diet (if necessary and for a season) to this topic so that you might experience the greatness of God’s love. If you are a Christian and you are not convinced of God’s love for you then I would recommend you confine yourself to this topic. Confine yourself to your study to this passage and other passages that reference adoption. Confine yourself for a season of time to the study of the doctrine of adoption. Immerse yourself in extended study" (C.J. Mahaney, sermon, “God as Father: Understanding the Doctrine of Adoption” - Dec. 2, 2007, 34:08-41:35).
Here is a resource link to get you started if you decide to study the doctrine of adoption in 2008.
(HT: Tony Reinke)