This is a quick easy way to optimize your blogger post title.
1. Sign in to Blogger
2. On your Dashboard, choose a blog and click Layout.
3. Click Edit HTML
4. Find(CTRL+F) <title><data:blog.title/></title>
5. Change it to:
<b:if cond='data:blog.pageName == ""'>
<title><data:blog.title/></title>
<b:else/>
<title><data:blog.pageName/> | <data:blog.title/></title>
</b:if>
<title><data:blog.title/></title>
<b:else/>
<title><data:blog.pageName/> | <data:blog.title/></title>
</b:if>
If the above code doesn't work for you, use this code below :)
<b:if cond='data:blog.pageType == "item"'>
<title><data:blog.pageName/> | <data:blog.title/></title>
<b:else/>
<title><data:blog.pageTitle/></title>
</b:if>
<title><data:blog.pageName/> | <data:blog.title/></title>
<b:else/>
<title><data:blog.pageTitle/></title>
</b:if>