The Login Toboggan module is easy to install and gives you more control over your site's user login page.

To install the module, simply download the latest version of Login Toboggan, unpack it, upload the module folder to your server in the sites/all/modules folder. After it's uploaded, browse to admin > site building > modules to enable the module.

To configure the module, browse to Administer > User Management > LoginToboggan. Here's what you can do with this module:

• You can allow users to login with their username or email address (good if you have users who may forget their usernames)
• Under registration, if you select "set password & immediate login", your users will be able to select their own password when registering, instead of being given one of those hard-to-remember drupal passwords and have to go change it themselves).  
• You set redirections after people sign up for a new account, which is useful, perhaps, if you want your users to read something specific after logging in.  
• In my opinion, probably the most useful feature of this module is the ability to redirect users to the login in page if they browse to content where they need to be logged in.  This is just a nice way to cut out an extra step in case people forget to log in (for example, if you're not logged in, try browsing to the admin page).  
• And you can also set it to display a "login successful" message which is actually a nice little visual cue to tell your users everything working well.