Block Up Down is a simple module that allows you to shift the order of blocks without going into the block administration. It does so by providing 3 new contextual links to any block: move up, move down and disable.
It is simple but pretty nifty and seems to work well. If you have multiple blocks in a sidebar you can very easily shift the order in which they appear directly from the contextual menu. No need for those page loads and searching through the many blocks you may have on your site. Also, you can disable them individually from the same place. The module uses Ajax so the whole process goes fast and easy without any page refresh.
It is a very new module created and maintained by Pol Dell'Aiera.
Hope this helps.