Now, I dont need to login my adsense account to check my earnings. Adsense notifier plugin logins to my account and shows my earnings on the firefox status bar. You can set it to show the info you want. Here is the download link:

Download Link

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2. Use the vacation responder to automatically send messages to contacts. You do not have to be on vacation in order to use the vacation responder. If I am facing a deadline and too busy to talk, I will set up my vacation responder to let people know that I appreciate their email and I will get back to them within a certain timeframe. This sets the expectation for them that I am not ignoring them and I will get back to them soon. My coworkers, family and friends appreciate it. You could also use the vacation responder to send “update” messages while you are away on vacation change the message and let people know how much fun you are having!

3. Save time when sending messages to groups by creating groups in your contacts list. Stop typing in the first few letters of the name or email address of 20 different people that you send those neat and crazy forwards to every day! Just create a group called “Forwards” and add them to the group. Now, you can just type “Forwards” and Gmail will do the rest. Check out the details for specific instructions on how to create groups within Gmail contacts.

4. Mute conversations that are either out of hand or you aren’t interested in. My family and friends “group email” each other all day, every day. Sometimes, the topic is nothing I want to talk about or have an interest in, so pressing “m” on my keyboard allows me to mute the conversation. All subsequent emails are automatically archived, and search-able by searching for “is:muted”. Filters still apply and you can unmute a conversation if you want to join in later.

5. Update your Web Clips to show your favorite RSS feeds and news clips right above your Gmail inbox. Gmail has many options available under the Settings menu, but you can add your own urls, too. The clips are shown randomly, and they are also clickable, so you can visit a blog directly from your email inbox or read up on some interesting news without typing in the URL everytime.

6.Create filters with multiple actions, to save time and keep your inbox clear. You have several options available to you, so use them! Coupled with the label system, you can create all types of filters that will make it easier to manage your incoming and existing mail. And you can also modify Gmail filters if you find it necessary.

7.View unread messages first:Search on the string “label:unread label:inbox” to force all of your unread messages to the top of the list, writes Matt Cutts. (Note: you don’t have to create any labels for this to work.) Try bookmarking Cutts’s search and dragging it to your bookmarks bar to view all unread messages first.

8.Streamline adding attachments: Wouldn’t it be great if you could drop attachments directly into the attachment box? Check out the Firefox extension Dragdropupload if you are running Firefox 2.0 (as of this writing, it hadn’t been updated for 2.0.0.12).

9.Quickly switch between Google accounts:

If you have multiple Google accounts—a Gmail with Google Apps account and a regular Gmail account, for example—streamline them with this script for Firefox with Greasemonkey. The script adds a “change user” drop-down bar in place of the “sign out” link.

You can also try Gmail Manager (also a Firefox extension), which adds a Gmail menu bar to the Firefox window. Juggle multiple accounts, sign in and out.

10. Automate frequently repeated text :Signature functionality is built into Gmail, but frequently typed phrases can be automated with Firefox extension Signature, which allows you to insert designated text with a keystroke. (As of this writing, Signature is not yet compliant with Firefox 2.0.0.12.) Also try a Windows app called AutoHotKey or Mac app TypeIt4Me. Both apps allow you to create keystrokes to automate text in virtually any application.