To browse meetings tap Email in the left hand nav bar
This will display all email that you have sent with the most recent at the top. If you clear your name from the By filter it will display all email that has been sent.
You can open any email from this list and reuse it like an email message template, just update the recipients and make any other minor changes and click send.
If you check the boxes to the left of messages you'll get the Actions menu give you the option to Delete all the selected messages.