I only just figured out how to truncate the posts on the home page to an excerpt and a link to more.
I thought the white background was too bright so I made it grey.
The main feature is a navigation bar at the top of the page I pilfered from some site.
Blogspot is the best and most tweakable free blog platform of the few I have tried, including wordpress.com. Unfortunately, unlike the paid-subscription wordpress.org, you can not access the underlying html in free wordpress.com. But you can access it in blogspot.com, which is very important for tweakers like me.
Here now is a fascinating* look back at all the different formats my blog's had over the years (*not):
I'm likely to tweak again, so for posterity here's what today's planetaryvision.blogspot.com site looks like:
Update 7 Sep 2015: I also spent quite a bit of time figuring out how to make an auto-self-updating site map. And I did extensive work on the pages section, after having obtained a smart mobile phone and realising how important they were for navigation.