1.  Locate your list of Active Campaigns from your Manager Dashboard.  In the top right corner you should see a green "Add Campaign" button.

2.  Name your campaign (Location and description are optional).  

3.  To bring over all settings from a previous campaign, make sure to select "Copy Configuration..." and choose an appropriate campaign.  You can always edit your campaign after creating.  

Note:  This is HIGHLY advised.  If you do not do this, you will have to completely configure your campaign from the ground up every time.