Useful android text keyboard shortcuts during typing browsing or messaging ?

I am using Android mobile phone from past couple of months and best part of it is ability to use shortcuts for complex common operations with a few keystrokes below are few key combination for frequently performed tasks i am now almost addicted to most of the below shortcuts

Shortcuts for typing:
Press ALT + Spacebar to insert a special character
Press Shift and roll Trackball to highlight text
Press Shift Twice to turn all text to caps
Press ALT + Delete to delete entire line
Press Alt while scrolling Trackball to move cursor to end or beginning of text
Press Alt + Q to insert a tab space
press Menu + x to cut text
press Menu + C to copy text
press Menu + v to paste text from clipboard

Shortcuts for browsing
Press Menu + I to zoom in
Press Menu + S to Zoom out
Press Menu + J to Go back page
Press Menu + K to go to next page
Press Menu + R toFind text on page
Press Menu + B to Bookmark the site/webpage
Press Menu + H to view browsing history
Press Menu + S to open settings

Shortcuts in gmail
Press Menu + U to refresh Inbox email header list
Press Menu + C to compose a new mail
Press R to reply Email
Press A to reply All Email
Press F to forward Email
Press Y to archive the message

Shortcuts in Google Maps:
Press Menu + D for directions
Press Menu + M for Map mode
Press Menu + H for maps history
Press Menu + 0(zero) for your location
Press Menu + P for map settings
Press Menu + I to Zoom in
Press Menu + O to Zoom out

Shortcuts to scroll faster
Press Spacebar for page down
Press Spacebar + Shift for pageup
Roll Down ALT + Trackball to jump end of list
Roll UP ALT + Trackball to jump top of list

but beware many of these shortcuts will not work on virtual keyboard such as shift, alt above shortcuts holds good for android devices with physical keypads