I recently purchased the "New Dictionary of Biblical Theology" (IVP) and am 
thrilled with it...I have used it in writing two of my sermons so far.

Another great series (I only have volume 5 so far) is the "Scripture and 
Hermeneutic Series" edited by my Old Testament and Hebrew professor, Craig 
Bartholomew.

These books really help to give the bigger picture of the whole of God's 
redemptive purposes from Genesis through to Revelation.  I highly recommend 
them as practical aids to preaching and teaching.

BTW, I am planning to go through the Psalter during Lent using the book 
"Singing in the Reign" by Michael Barber.  He highlights the five-fold 
structure of the Psalter and so one can basically take Psalsm from these 
sections and preach through the whole by refering to the overall theme of 
each section.  This book is a must read anyway.  I will send my proposed 
outline next.

The Rev. Fr. Johann W. Vanderbijl III, Rector
The Anglican Church of St. George the Martyr, R.E.
427 Batesville Road
Simpsonville, SC 29681
cranmer@...
www.stgeorge-re.org