These videos demonstrate some of my techniques and approaches that can work for you:

Custom Document Templates and Office Automation: Word

Custom PowerPoint Templates and Add-Ins

Content Storage and Retrieval for Automated Document Templates

    Part 1: Introduction to Templates and Toolbars

    Part 2: Organizing a Content Library

    Part 3: Using Excel to Store Text Content

    Part 4: Reusable Content in Word Building Blocks

    Part 5: Automating with Word Content Controls

    Part 6: Techniques for Organizing Graphic Content