I see a few tasks for myself immediately.
continue to refine the graphics through out the site. This includes one image for each of the splash buttons on the frontpage, the image for the training guide box, and the hand.
look into the thumbnail bug
start making contribution page
It'd be nice if <p> and <li> are distinguished for different types of content. In the current documentations, paragraphs (no bullet) and lists (bullet points) are being used interchangably.
Image editing (who can take a look over images)
I've noticed a few extra-large images. All the images/screenshots should have a width less than 400px to achieve a consistent look.
I think that each chapter should have the following format:
(copied above comment by @MappingKat to corresponding issue #15)
divided tasks into #18, #19, #20, #21. Closing here