Here some tricks and tips that come handy when building your own child theme.

Basic Child theme info

Right from the Codex.

http://codex.wordpress.org/Child_Themes

 

How to Modify the Parent Theme Behavior Within the Child Theme

Removing features.

http://code.tutsplus.com/articles/how-to-modify-the-parent-theme-behavior-within-the-child-theme–wp-31006

 

A Guide to Overriding Parent Theme Functions in Your Child Theme

Pluggable functions and function priority. Removing Functions From Hooks.

http://code.tutsplus.com/tutorials/a-guide-to-overriding-parent-theme-functions-in-your-child-theme–cms-22623

 

Replace a non pluggable function in a WordPress parent theme with a customized function in the child theme

Replace a non pluggable function in a WordPress parent theme with a customized function in the child theme