Change post title in blogger,this is the best hack then previous as only post title is the title for seo and will be searched. As blog title will not be indexed in it as previous.It all depend on you to use which hack as if you feel you blog title to be indexed as well with every title then you can use previous post else follow my this new change post title hack in blogger.
Go to Layout then EditHtml
Search for this tag <title><data:blog.pagetitle/></title>
Replace this tag with Following tag-
<b:if cond=’data:blog.pageType == "index"’>
I hope you will like this swap title hack as this is very good for search engine optimization.