So you're busy on your thumbnails, right? I hope you're keeping it nice and simple. Don' add too much detail, just focus on planning the action.
I've heard from a few of you who are interested in improving your thumbnail drawing technique.
Here are two resources perfect for planning animation. One is by a former teacher of mine and former ILM animator, Wayne Gilbert. You can buy his book directly for $35 including shipping here: http://anamie.com/anamie_book.html
Read a great review here:
|sample page from Drawn to Life|
A bigger, meatier resource is the 2-volume tome "Drawn to Life: 20 Golden Years of Disney Master Classes: Volume 1: The Walt Stanchfield Lectures" by former Disney instructor,Walt Stanchfield. You can get these online or at Labyrinth.