1. Remove/Hide the Top Blogger bar:
A. Go to your template and click Edit Template/HTML
B. Look for this code <b:skin><![CDATA[ and add the following after it.
#navbar-iframe{height:0px; visibility:hidden; display:none} body{ margin-top:0px; position:relative; top:2px}
That's all you have to do to remove the top blogger bar.
2. Change Post Title tag for search engine friendly:
A. Look for this code <data:blog.pageTitle/>. and Replace it with the following code:
<b:if cond='data:blog.pageType == "index"'>
<title><data:blog.title/></title>
<b:else/>
<title><data:blog.pageName/></title>
</b:if>
3. Insert Meta tags To help search engines index your blog by proper keywords and descriptions:
A. Look for this code <head> and add the following code after it.
<b:if cond='data:blog.url == data:blog.homepageUrl'>
<meta content=' DESCRIPTION OF YOUR BLOG TO APPEAR ON SEARCH PAGES ' name='description'/></b:if>
<meta content='WRITE YOUR BLOG KEYWORDS HERE, IT IS RECOMMENDED BETWEEN 5-8 WORDS' name='keywords'/>
I believe these are the three important steps you should do, but there are more things that you must do to improve your blog. I hope this help.