One of the most-sought missing features from Blogger is the little button you click to show your posts in chronological order, oldest first.
Where Blogger fears to tread, however, clever hackers (one of them too clever by half) have rushed in with template modifications and other tricks.
As of this writing there are four different hacks to show your blog's content first to last instead of last to first, each method with its own advantages and disadvantages. Here's a quick survey.