forms.scala

trait FormUtils {
  def FormAction(form: Form[User])(block: (User) => SimpleResult): EssentialAction = {
    Action { request =>
      form.bindFromRequest()(request).fold(
        errors => BadRequest(errors),
        user => block(user)
      )
    }
  }
}

object Application extends Controller with FormUtils {
  
  val myForm = Form( ... )
  
  def index = FormAction(myForm) { user =>
    Ok(views.html.index(user))
  }
}