1. Install module throught Magento Connect, extension key is "magento-community/Luxe_Bestsellers"
2. Add the "bestsellers/list" block to the home page. You can do it at the CMS->Manage Pages page in the admin area.
3. Clear cache on the System->Cache Managment page in the admin area
4. Log out from admin area and login again.

This module has several configuration parameters, located under "Catalog" section at the Admin-System-Configuration page. Below is short description for each configuration parameter:
The number of displayed products - set number of products, which should be displayed. If this parameter is not specified then all products will be shown.
Display for last(days) - set time interval used to select products. For example if this configuration parameter set to "7", then module will display products for last week(7 days). Please, note that you will not see any products if you haven’t made any sales during the time period you specify.
List Mode - set in which mode should displayed products (Grid/List)

Since version 0.1.7 of Bestsellers module all this configuration parameters can be specified in "block" tag. This new feature allow you display saveral different bestsellers blocks. For example "Months Bestsellers" and "Week Bestsellers". The code below will display weeks bestsellers:
{ { block type="bestsellers/list" name="week.bestsellers.list" alias="week_bestsellers" template="catalog/product/list.phtml" display_mode="grid" time_limit_in_days="7" limit="3"} }
Please, note that this code should be writen without spaces between curly brackets.
As you can see in this example, the display_mode tag attribute specify List Mode (allowed values is 'grid' or 'list'), time_limit_in_days specify Display for last(days) parameter and limit specify The number of displayed products. Configuration parameters, specified in the block tag have most priority.