In order to manage sidebars and widgets, go to Appearance -> Widgets admin page.
AWSM theme supports widgets and provides 3 different sidebar areas. As a standard WordPress feature, you just drag and drop any widgets to the sidebar areas listed on the right side of the screen:
Blog Sidebar This area is displayed on blog page templates with style 1,2 and 3, as well as single post pages and archive pages.
Blog Sidebar This area is displayed on default single page template.
Footer This sidebar represents the footer area. Drag and drop widgets you want to be displayed in footer or leave empty and disable footer in Theme Options.