This is no howto at all yet but there are a lot of StrutsResources on the web...
Some general things:
What is struts: StrutsOverview
Why use struts: StrutsStrength
Why don't use struts: StrutsWeakness
Some howto-do-this in struts:
How to process forms: StrutsFormProcessing
How to use internationalization: StrutsInternationalization
How to provide Error-Messages: StrutsErrorMessages
Some general things:
What is struts: StrutsOverviewWhy use struts: StrutsStrength
Why don't use struts: StrutsWeakness
Some howto-do-this in struts:
How to process forms: StrutsFormProcessingHow to use internationalization: StrutsInternationalization
How to provide Error-Messages: StrutsErrorMessages