You can pick and choose which newsletters to display on your landing page.  Click on Manage and select the appropriate section (Monthly, Custom, New Arrivals, etc).  Uncheck the box of the newsletter that you do not wish to display.  Your landing page will update automatically (you may need to refresh your page).  A newsletter that is unchecked will not be delivered via email.  You can enable that newsletter at any time by going in and checking the box.