You are always in a chapter of Grudem's Book "Bible Doctrine".  A chapter a week-ish.

Another great resource to have is Pocket Dictionary Theological Terms by Stanley Grenz.  

Think about a "side" book you can read (in addition to one chapter a week-ish from Grudem's theology book) that will grow you in certain areas.  

For example:

Women of the Word by Jen Wilkin
Spiritual Disciplines by Don Whitney
Every Man's Battle by Stephen Arterburn
Every Woman's Battle by Shannon Etheridge
Living by the Book - Howard Hendricks
Read the Bible for Life by George Guthrie
Inductive Bible Study by Andreas Kostenberger
Counterfeit Gods by Tim Keller
The Freedom of Self Forgetfulness by Tim Keller
Walking with God Through Pain and Suffering by Tim Keller
Prayer by Tim Keller
Knowing God by J I Packer
Marriage, Divorce & Remarriage In the Bible by Jay Adams
Strengthening Your Marriage by Wayne Mack
Uprooting Anger by David D. Jones
Instruments in the Redeemers Hands by Paul Tripp
Parenting by Paul Tripp
Age of Opportunity by Paul Tripp
How People Change by Paul Tripp
An Introduction to Biblical Ethics by David W. Jones
Health, Wealth and Happiness by David W. Jones
Every Good Thing by David W Jones
Truth Matters by Andreas Kostenberger
Truth in a Culture of Doubt by Andreas Kostenberger
Praying Backwards by Bryan Chapell
Humility by C J Mahaney
Discipling by Mark Dever