Here is a helpful article by Thabiti Anyabwile on "5 Things Every Christian Should Do Before Leaving Their Church". In our church we had numerous opportunities to share this article with those considering leaving. It was one of the better resources we used to shepherd people considering this difficult decision. The main points follow, to read the full article click here.
1. Share Your Thinking/Reasons with the Leaders
2. Resolve Any Outstanding Conflicts
3. Express Your Appreciation for the Church’s Ministry in Your Life
4. Say “Goodbye” to Friends and Family
5. Be Honest with Yourself about Your Own Efforts, Motives and Failings