After you login there is a navigation menu in the sidebar that has links to create content and manage various modules. The links listed depend on how you have your site set up.

Navigation Menu

• My blog - A page that shows an overview of your blog articles.
• Create content - Here is where you can create new content for your site.
• My account - A page where you can edit your account options such as change password.
• Categories - Manage category/taxonomy terms.
• Comments - manage and moderate visitor comments.
• Content - Lists all existing content and give option to edit it.
• Forums - Manage forums.
• Image galleries - Manage image galleries.
• Post settings - Configure the settings for posts that go into blogs, front page, etc.
• Search content - Use the built-in search capability to find things.

There are many more available depending on how your site is configured but these are the most common.