Pass compositioned data to views

admin_user_into_viewbag

//You could also use a base controller and put this in there.
public class AdminUserViewBagAttribute : ActionFilterAttribute
{
  public override void OnActionExecuting(ActionExecutingContext filterContext)
  {
    filterContext.Controller.ViewBag.IsCurrentUserAdmin = magic.FigureThatOut();
  }
}

use_partialviewresult_with_separate_viewmodels.cs

public ActionResult ViewPost(string permalink)
{
  var post = magic.GetPostBy(permalink);
  var viewModel = new PostView { Post = post };
  viewModel.Related = magic.GetContentRelatedTo(post);
  Return View(viewModel);
}

public ActionResult Homepage()
{
  var posts = magic.GetRecentPosts();
  var viewModel = new HomepageView { Posts = posts };
  viewModel.Related = magic.GetContentRelatedToMany(posts);
  Return View(viewModel);
}

//This possibly might be in another class... like a shared controller or something
public PartialViewResult LayoutWidgets()
{
  var viewModel = new LayoutWidgetsView
  {
    Archive = magic.GetArchive(),
    TagCloud = magic.GetTagCloud()
  }
  return View(viewModel);
}