How to add google +1 button in side blogger template:Easy way to increase traffic

Where should I put the +1 button on my pages?

You know your page and your users best, so we recommend putting the button wherever you think it will be the most effective. Above the fold, near the title of the page, and close to sharing links is often a good location. It can also be effective to place the +1 button at both the end and the beginning of an article or story.
+1 is a public action, so you should add the button only to public, crawlable pages on your site. Once you add the button, Google may crawl or re crawl the page, and store the page title and other content, in response to a +1 button impression or click.

Adding  +1 button  below the Post title and Inside Post Left or Right Top corner
Log in to blogger
Click Design
Click Edit HTML tab
Expand Widget Templates
Find

<div class='post-body entry-content'>

Immediately after that  paste code  given below

<div style='float: right;'>
<script src='http://apis.google.com/js/plusone.js' type='text/javascript'/>
<g:plusone size='small'/>
</div>

Adding  +1 button  below the Post title with  author  Meta

Log in to blogger

Click Design
Click Edit HTML tab
Expand Widget Templates
Find 

<data:post.author/> or <data:post.author/></span>

Immediately after that ,paste code  given below

<span>
<script src='http://apis.google.com/js/plusone.js' type='text/javascript'/>
<g:plusone size='small'/>
</span>

 Optional Tweaks
change small to medium or tall for different look