You may have heard of all the meta-tags that can help with your Google ranking. Of course there aren't any. But there are some tips and tricks that you can use to maximize your SEO.
One means by which Google and other Search Engines rank pages is by the use of the Heading Tag. Heading Tags There are 5 heading tags but only the H1 is truly meaningful in SEO searches.
For some reason Blogger Templates use either a H2 or H3 for the post title. So, assuming you are optimizing your post titles, you should change the Heading Tag associated with your post title to H1.
Go to Layout > Edit Layout and
do a search for "data:post:title" and change the H2, or H3 if you're using one of the Minima Templates, to H1.
Don't forget to change your style sheets. Do a search for H2 or H3 and change them to H1. Make certain you change only the ones with "post."
EDIT: May 6, 2010
I've been told that Google doesn't like it when there are more than one H1 per page. If that's true then changing H3s to H1 is not a good idea. I'm researching this to see if this is true.