1) Screenshot/Screen Clipping :
There is now a feature on the Insert menu that allows you to either grab a screen
shot of any open window or just crop a screen clipping of any open window and
you can easily use that screen. This is extremely helpful for creating user guides,
knowledge base entries, or blog posts.
2) Navigation :
it makes navigating through the menus much easier than previous versions of Outlook.
It also includes Quick Steps, which are a series of buttons that you can configure
to perform custom actions that you frequently take, such as creating a button
to start a new email message for your team, or a button to archive an entire
conversation in one click.
3) The Quick Steps Menu :
This is a very convenient new feature. It consists of a menu, neatly placed on the
ribbon, just above your Inbox. The menu is customizable and allows you to automatically
accomplish multiple actions in a single click, such as creating email messages
to specified people and/or groups, filing a message or categorizing a message
etc. It also allows you to associate performing those actions with keystrokes
(hot key).
For example, suppose you are employee of one company & you want to send reports
to your system analyst then you can create a new quick step called “System Analyst”.
When you will click on it, it will automatically create a new compose box for
you and email id is automatically added which set.
You can also set shortcut key like CTRL + SHIFT + 0, CTRL + SHIFT + 1 etc. In addition,
you can create actions to move a selected email to any folder of your choice
and associate that action with a keyboard shortcut.
See Below Image :

4) Associating Pictures To Contacts :
Outlook 2010 gives you the ability to associate pictures with your contacts, so that
each time you receive an email from that person, you will see their picture (or
your selected photo which you set for that person) in the corner of the email.
Since you are associating the picture with only your contacts and you are the
only one who will see these pictures.
See Below Image :

5) E-mail Dialogue View :
Dialogue view is a spot of new Outlook 2010. It aimed at help users to manage a large
number of messages faster and better through different sorting ways. It provides
total 9 different dialogue views. Users can choose according to their own habits.
6) Quick Access Toolbar :
This is easily remedied by adding the shortcut to the Quick Access toolbar located
just above the File Menu. By left clicking on the down arrow on the right of
the toolbar, you can quickly access some of the most common commands or access
the entire command listing to add as many icons as you like. Send/receive and
undo are there by default, but you can add just about anything you can think
of. You can also access the toolbar customization list from the options menu.
In short for quick access of any function you want that you can customize here
& easily you can set here.
See Below Image :

7) Managing Conversation :
Outlook 2010 also introduced new threaded views for managing conversations so that
they do not clutter your mailbox. You can combine and collapse conversations
so that they are not scattered among other inbox items and you can include your
own sent items so that you can see the whole conversation at the same time.
8) Different Exchange Organization :
While older versions of Outlook allowed you to connect to multiple mailboxes in the
same Exchange organization, Outlook 2010 allows you to connect to mailboxes in
different Exchange organizations. This is very useful for administrators and
consultants who need to access different mail systems throughout the day.
9) Scheduled Tasks And Work Efficiently Everyday Using Calendar :
In the new version, we can easily find the small calendar in the right side of homepage.
It is a new function – easy calendar program. In the module, users can make a
detailed work plan schedule in any day. You can set a specific time scheduling
which can alert you by mail.
You can easily remind something which is special for you.
10) Add New Tools :
Try the new personalized E-mail writing system. Users will not be restrained by the
old form. The most attractive are motion graphics and image editing tool. Users
will no longer depend on Word and PowerPoint. Using Outlook 2010, you can use
the eye-catching image (preset SmartArt ™ graphics, themes and styles) to attract
readers. You can also insert and set screen shot format to bring your creative
to readers more convenient. Easily insert special formats & images in your
email.