My friend Sandra Sims at Step By Step Fundraising has a series of articles on grant writing this month. One article features a long list of grant writing resources. Read for yourself at http://stepbystepfundraising.com/20-free-grant-writing-resources-non-profits/.
Your readers might also find Grant Writing Confidential useful. Its most popular posts have tended to be about technical aspects of grant writing, including The Goal of Writing Objectives is to Achieve Positive Outcomes (Say What?), Writing Needs Assessments: How to Make It Seem Like the End of the World, and What Does a Grant Proposal Look Like Exactly? 13 Easy Steps to Formatting a Winning Proposal.
(Note: I left this comment at Sandra’s site as well, before I found yours.)