Realtrix has a very good hack on making Related Posts for blogger.com / blogspot. It works well. This is the simple way how to do it (visit Realtrix post for more details):
1. After login to your blogger.com -> layout -> Edit HTML -> Expand Widget Templates
2. Find the following code
<div class='post-body'>
<p><data:post.body/></p>
<div style='clear: both;'/> <!-- clear for photos floats -->
</div>
<div class=’post-footer’>
3. Copy this code -> <div id='related_posts'/> and put it between
<p><data:post.body/></p>
<div style='clear: both;'/> <!-- clear for photos floats -->
</div>
and
<div class='post-footer'> (See the screenshot)
4. Copy this code (update 28 Nov 09) There’s a rule change, you have to get the following code along with a key, see the details here.
<script src='http://www.google.com/jsapi'/>
<script src='http://brps.appspot.com/brps.js' type='text/javascript'/>
And put it precisely ABOVE </body>
</html>
5. SAVE. Done.
NOTE: The position of code number 3 might differ from template to template. The point is you should put it so that it appears in single page (that is a page when you click a particular article or blog post), not in the frontpage / homepage of your blog. See the live demo here.
Picture / screenshot Code #3 position

wah asyik nich, thanks ya
great. i will try later. thanks
thanks for the script
nice tuts. it’s work… thanks…
hey this is a very interesting article!
Terimakasih, dalam 2 langkah sudah jadi post yang berkaitan dengan label ini.
Great! I will apply it in my blog later on.
Thanks that good tutorial. I was use it. Now my blog use related posts. (sory bahas inggris saya masih kacau, ini lagi belajar..he he he)
mas Fatih,
Related Post disini maksudnya berkaitan judul posting atau content yg ada di posting tsb ?
mantap…