Home Tab

New

New Email - (Ctrl + Shift + M). Create a new email message.
New Items - Drop-Down. Create new items. The drop-down contains the commands: Email Message, Appointment, Meeting, Contact, Task, Email Message Using and More Items.

Delete

Ignore - (Ctrl + Delete). Move current and future messages in the selected conversation to the Deleted Items folder. This feature may not be available if you are running in online mode connected to Exchange Server 2007 or earlier.
Clean Up - Drop-Down. Remove redundant messages in the selected conversations. This feature may not be available if you are running in online mode connected to Exchange Server 2007 or earlier.
Junk - Drop-Down. Mark the selected item as junk or prevent items sent by this sender, this sender's domain or this group or mailing list from being marked as junk. This drop-down contains the commands: Block Sender, Never Block Sender, Never Block Sender's Domain, Never Block This Group or Mailing List, Not Junk and Junk Email Options.
Delete - (Ctrl + D). Delete the selected items.

Respond

Reply - (Ctrl + R). Reply to the sender of this message.
Reply All - (Ctrl + Shift + R). Reply to the sender and all other recipients of this message.
Forward - (Ctrl + F). Forward this item to someone else.
Meeting - (Ctrl + Alt + R). Create a meeting request from this email.
IM - Instant Message (Removed in 2010)
More - Drop-Down. More Respond Options. Use other response actions that can include forwarding this item as an attachment or text message or calling the sender of this item.

Quick Steps

You can quickly display the "Manage Quick Steps" dialog box by clicking on the dialog box launcher in the bottom right corner of the group.

Quick Steps Gallery - Contains Reply & Delete, To Manager, Done, Create New, New Quick Step, Manage Quick Steps.

Move

Move - Drop-Down. The drop-down contains the commands: Inbox, 9 other Folders, Other Folder, Copy To Folder.
Rules - Drop-Down. The drop-down contains the commands: Always Move Messages From, Create Rule and Manage Rules & Alerts.
OneNote -

Tags

Assign Policy -
Unread / Read - (Ctrl + U / Ctrl + Q). Mark this item as read or unread.
Categorize - Drop-Down. Categorises applied to a conversation will be applied to all current and future items in the conversation. Blue, Green, Important, Orange, Red, Purple, Yellow, All Categories, Set Quick Click.
Follow Up - Drop-Down. Set a flag to remind you to follow up on this item later. The drop-down contains the commands: Today, Tomorrow, This Week, Next Week, No Date, Custom, Add Reminder, Mark Complete, Clear Flag, Set Quick Click.

Find

Search People -
Address Book - (Ctrl + Shift + B). Displays the "Address Book" dialog box to look for names, phone numbers and email addresses.
Filter Email - Drop-Down. The drop-down contains the commands: Unread, Has Attachments, This Week, Categorized, Flagged, Important, Sent to Me or CC and More Filters.