option to promote to top of list in drupal
By default, you will find a checkbox on every node-edit form called "Sticky at top of lists". It's under the "Publishing options". If you use that to identify the top content, you can add a sort criterion "Node: Sticky" (descending) to your view to make the selected nodes appear on top.

If you need even more control (ie. you want to specify the exact order) use a module like Draggable Views or Nodequeue.