Como Colocar Postagens Relacionadas no Blog

1° Passo: Depois de </head> coloque o código abaixo:

<!--Postagens relacionadas-->
<link href='http://fonts.googleapis.com/css?family=Montserrat' rel='stylesheet' type='text/css'/>
<style type='text/css'>
#related-posts{
float:left;
width:auto;margin-left: 24px;}
#related-posts a{
border-right: 0px dotted #eaeaea;}
#related-posts h4{
margin-top: 10px;
background:none;
font:17px Montserrat;
padding:3px;
color:#000;
text-transform:none;
text-align: center !important;}
#related-posts .related_img {
margin:10px;
border:2px solid #f2f2f2;
object-fit: cover;
width:140px;
height:130px;
-webkit-border-radius: 5px;
-moz-border-radius: 5px;
border-radius: 5px; }
#related-title {
color:#222;
text-align:center;
text-transform:none;
padding: 0px 5px 10px;
font-size:13px;
width:150px;
height: 40px;}
</style>
<script type='text/javascript'>
//<![CDATA[
var relatedTitles=new Array();var relatedTitlesNum=0;var relatedUrls=new Array();var thumburl=new Array();function related_results_labels_thumbs(json){for(var i=0;i<json.feed.entry.length;i++){var entry=json.feed.entry[i];relatedTitles[relatedTitlesNum]=entry.title.$t;try{thumburl[relatedTitlesNum]=entry.gform_foot.url}catch(error){s=entry.content.$t;a=s.indexOf("<img");b=s.indexOf("src=\"",a);c=s.indexOf("\"",b+5);d=s.substr(b+5,c-b-5);if((a!=-1)&&(b!=-1)&&(c!=-1)&&(d!="")){thumburl[relatedTitlesNum]=d}else thumburl[relatedTitlesNum]='https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiQMaaDM5J8vUU_NCZg_pjqSZAZx_p1bN6Y44E9grGJMi9r68F_seP5ZTRtDxhGj7okRFkovBTHKwFJIPulf5Nt6trzLs4ppHL3fgx5ySEz-QT7rqhUR5YrXg1jf3S5WExOgM_f3hpvVNcc/s1600/no-thumbnail.png'}if(relatedTitles[relatedTitlesNum].length>35)relatedTitles[relatedTitlesNum]=relatedTitles[relatedTitlesNum].substring(0,35)+"...";for(var k=0;k<entry.link.length;k++){if(entry.link[k].rel=='alternate'){relatedUrls[relatedTitlesNum]=entry.link[k].href;relatedTitlesNum++}}}}function removeRelatedDuplicates_thumbs(){var tmp=new Array(0);var tmp2=new Array(0);var tmp3=new Array(0);for(var i=0;i<relatedUrls.length;i++){if(!contains_thumbs(tmp,relatedUrls[i])){tmp.length+=1;tmp[tmp.length-1]=relatedUrls[i];tmp2.length+=1;tmp3.length+=1;tmp2[tmp2.length-1]=relatedTitles[i];tmp3[tmp3.length-1]=thumburl[i]}}relatedTitles=tmp2;relatedUrls=tmp;thumburl=tmp3}function contains_thumbs(a,e){for(var j=0;j<a.length;j++)if(a[j]==e)return true;return false}function printRelatedLabels_thumbs(){for(var i=0;i<relatedUrls.length;i++){if((relatedUrls[i]==currentposturl)||(!(relatedTitles[i]))){relatedUrls.splice(i,1);relatedTitles.splice(i,1);thumburl.splice(i,1);i--}}var r=Math.floor((relatedTitles.length-1)*Math.random());var i=0;if(relatedTitles.length>0)document.write('<h4>'+relatedpoststitle+'</h4>');document.write('<div style="clear: both;"/>');while(i<relatedTitles.length&&i<20&&i<maxresults){document.write('<a style="text-decoration:none;margin:0 4px 10px 0;float:left;');if(i!=0)document.write('"');else document.write('"');document.write(' href="'+relatedUrls[r]+'"><img class="related_img" src="'+thumburl[r]+'"/><br/><div id="related-title">'+relatedTitles[r]+'</div></a>');if(r<relatedTitles.length-1){r++}else{r=0}i++}document.write('</div>');relatedUrls.splice(0,relatedUrls.length);thumburl.splice(0,thumburl.length);relatedTitles.splice(0,relatedTitles.length)}
//]]>
</script>
<!--Final do script das Postagens relacionadas-->

2° Passo: Coloque o código abaixo onde quiser que as postagens relacionadas fique. Para coloca-lo no final das postagens procure post-footer-line-1 e coloque o código abaixo depois dessa linha.

 <!-- Postagens relacionadas - Início do código HTML-->

<div id='related-posts'>
<b:loop values='data:post.labels' var='label'>
<b:if cond='data:label.isLast != &quot;true&quot;'>
</b:if>
<b:if cond='data:blog.pageType == &quot;item&quot;'>
<script expr:src='&quot;/feeds/posts/default/-/&quot; + data:label.name + &quot;?alt=json-in-script&amp;callback=related_results_labels_thumbs&amp;max-results=4&quot;' type='text/javascript'/>

</b:if>
</b:loop>
<script type='text/javascript'>
var currentposturl=&quot;<data:post.url/>&quot;;
var maxresults=4;
  var relatedpoststitle=&quot; Veja também:&quot;;
removeRelatedDuplicates_thumbs();
printRelatedLabels_thumbs();
</script>
</div><div class='clear'/>
<!-- Postagens relacionadas - Final do código HTML-->

Dica: Se quiser que as postagens relacionadas aparecem na página principal e não somente dentro dos posts retire o:

<b:if cond='data:blog.pageType == &quot;item&quot;'>

e também o:

</b:if>