For some people interested in sketching, drawing cartoons this might be a useful little tutorial. ”The Role of Sketching in the Design Process” explains the 5 Uses for Sketching in Design.  

The role of sketching in digital art varies depending on if your creating websites, identities, illustrations, product concepts, or other designs. An illustration or a logo is likely to need more sketching than a website. 

On a related note. Make sure you also check out Creating Successful Comics which explains on how to “Create Appealing Comics”, “Comic Book Publishing Alternative” and “Web Comic Advertising Secrets”