Featured image was introduced in wordpress 2.9 as before that theme developers are using different type of techniques to show featured image for each post.
Featured image is used to enhance the value of your post on the front page and it also increase the appeal of that particular post, but as the blog grow it is very hard to search and enable featured image for each and every post.
The simple solution of this problem is, Why not to define a featured image for each category,so that when we are running sort of time to locate a perfect picture for that post, Display a default image assigned for that category.
Step 1: Find out Default pictures for each category
This is one of the toughest part of this whole workout, As most of the time quality images are protected through copyright. Flicker and creative commence are two good options for the same. Decide which photograph best suite for each category.
Step 2 : The Code for featured Image per Category
Open your index.php file and paste the following code inside the main loop. The below code, I have taken from my theme iNivo ,which is available on free of charge at themes section.
The Whole concept was developed by the man you are watching here. I am rakesh Kumar Serial Niche Blogger and SEO Enthusiast. find me onfacebookandon twitter.. Developed popular WordPress theme for Wallpapers and funny Image WordPress theme. Love SEO optimized WordPress theme Designing and Customization.