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:

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
Counterfeit Gods by Tim Keller
Knowing God by J I Packer
Marriage, Divorce & Remarriage In the Bible by Jay Adams
Uprooting Anger by David D. Jones
Instruments in the Redeemers Hands by Paul Tripp
An Introduction to Biblical Ethics by David W. Jones
Health, Wealth and Happiness by David W. Jones
Prayer by Tim Keller
Humility by C J Mahaney