When in your Inbox:
If you hold down any key a message will appear to assign it to a speed dial.
If you assign a contact you will then be able to call that number just by holding down the key you assigned.
R=reply to the message
F=forward a message
U=goes instantly to unread messages
Shift+space or Space key = scroll up or down your inbox
T= Top of the page
To view all received messages and phone calls hold Alt+I in your inbox.
To view all outgoing messages and phone calls hold Alt+O in your inbox.
You can also view all text messages by pressing Alt+P.
Which Programs Are Shortening Your Battery Life?
Check which programs use the highest % of your CPU.
Option→ Device→ Application Management→ scroll across the top and you can check your CPU % for the day at that moment etc, the amount of memory each application is using etc