Shortcuts! I'm using Eclipse Juno in case that matters
Changing file / view / perspective
Ctrl+Shift+R: Quickly open a file in the workspace with autocomplete Ctrl+E: Quickly change to an open file with autocomplete Ctrl+F7: Quickly change / activate a view (Editor, package inspector, etc) Ctrl+F8: Quickly change perspective Alt+(left/right): Go to previous / former position or file.
Navigating source code
F3: Go to definition of method under the cursor Ctrl+O: Show the class overview, with autocomplete (pressing it again shows the inherited methods)
Ctrl+1: Open the quick refactoring menu Ctrl+Alt+R: Rename a method / variable Ctrl+Alt+M: Move the highlighted code out into an extracted method Ctrl+Alt+L: Refactor selected text into a local variable Ctrl+Alt+O: Organise imports (delete unused etc)
Ctrl+Shift+B: Add a breakpoint to the current line F11: Debug last thing debugged F5: Step into method (while debugging) F6: Step over line (while debugging) F8: Resume (while debugging)
Ctrl+F11: Run the previous thing which we ran (must set in Preferences -> Run/Debug -> Always launch previously launched activity)