This page is a collection of links to various essays and articles dealing with the possible pitfalls an author of alternate history might experience while working on his scenario/timeline.
How extensive is the butterfly effect? Speculation...
What are the moral responsibilites of alternate history?
Is there a philosophy of history for alternative history?
The butterfly effect and human culture
How do you like to view timelines?
Alternate Histories written like a non-fiction textbook
OTL as "default TL" in multiverses?
The Sliding Scale of Alternate History Plausibility
AH.com Specialists 1 & AH.com Specialists 2 - Lists of board members who might be able to help you with various historical questions while you're writing your timeline.